i became the younger sister of the regretful

The promotional poster that would be great if you had a sister can be used as an example: The background of the poster was a beautiful lake with sparkling water. A young man was standing on a bench by the lake, staring blankly at the water. His face was delicate and his eyes were gentle, as if he had endless thoughts and sadness. The first half of the poster mainly showed the protagonist's life scene. He lived in a beautiful town with a stable job and a cute pet cat. Although his life was dull, it was filled with happiness and warmth. In the lower half of the poster, we can enjoy the interaction between the protagonist and his sister. The younger sister was a lovely girl with bright eyes and a sweet smile. The protagonist often took her out for walks, bought her gifts, and took care of her life. Their relationship was deep and filled with love and care. The design of the entire poster was simple and clear, using fresh colors and simple typography. It conveyed a warm and touching emotion, making people feel the pure feelings between the protagonist and his sister.

As a person who loves reading novels, I don't have the ability to access the internet and can't provide you with the complete works of novels. If you have any other questions, I'll be happy to help you.

The light novel " If only I had a younger sister " was a manga created by Japanese manga artist Yoshihiro Tomika, which was later adapted into various forms such as animation, novels, and games. The story was about the protagonist, Akiyama Shura, who was an ordinary high school student but had always dreamed of having a younger sister. Later, he met a mysterious girl who told him that she had a special ability that would allow him to have a sister. Thus, Akiyama Shura began a series of adventures in an attempt to find this mysterious girl and establish contact with her. This novel was full of romance, family and friendship, and was very popular among young readers.

😋I recommend you a novel,'Tong Hua blooms in spring'. The female protagonist's sister is the man's sister, and she's mute. I hope you like my recommendation, Mwah ~😗

I recommend "Peach Blossom Parting". The female protagonist in this book was also a princess, and the emperor was her brother. There was also a plot of a son-in-law and the king of an enemy country, but there was no plot of twins. However, I believe that you will like this novel as well. I hope you like this fairy's recommendation. Muah ~😗

In the ACG world, there were many anime characters whose older sisters looked younger than their younger sisters. For example, the mother of the female lead, Ryuuma, in " The Prince of Tennis," Yoshie Toyama, looked younger than Ryuuma herself. Another example was the mother of Dangma Shangjo, Kyoko Shangjo, in the Index of Forbidden Magic Books. In addition, there were many other anime characters whose older or younger sisters looked younger than their younger sisters.

[It might not meet your needs, but I'll try my best to recommend a novel that is most relevant to your description of your needs. The book," The Great Martial Immortal ", is a novel about Xianxia and Wuxia romance written by the author, Yueshang Xiao. The general plot of this novel is as follows: The female protagonist of this article was cold, arrogant, and did not act cute. She devoted herself to cultivation and upgraded all the way. She might be the illegitimate daughter of the Heavenly Dao. ---------------------------- " Cool as the Moon " was a fantasy romance novel written by the author Chu Qiushi. The general plot of this novel was: This was the story of a local genius girl who used the moon spirit body as a foundation to comprehend the Sorrow and Joy Sword Intent. She held a three-foot-long sword and pursued the extreme of cultivation. Note: 1. This is a story about a biological daughter. The female lead's talent and background will be very strong, but there will be relatively fewer opportunities in the later stages. 2. The supporting roles in this story will be relatively more, and the female supporting role will be more than the male supporting role. 3. There will be no CP. ---------------------------- " The Moon Goddess of Cultivation " was a fantasy romance novel written by the author, Lianhua. The general plot of the novel was: Long Xiyue came from the Long Family of the South Sea, but she was a child who was picked up. On the way to explore her identity, she met Chu Rui, who was looking for her grandfather, and Brother Qi, who had an inexplicable connection with her. The three of them grew up and matured, experiencing sorrow, joy, and sadness. ---------------------------- " Whose Daughter Isn't frivolous " was an ancient romance novel written by the author, Xiao Yueli. The general plot of this novel was: In a single transmigration, the young lady of an ancient martial arts aristocratic family had actually become a weak Di daughter who had cursed her grandfather to death, was neglected by her father, and was bullied by her entire family! His mother was weak, his father was unfeeling, his grandmother was biased, his sister was green tea, his cousin was white lotus, his aunt was vicious, and his servants were rude. How could he tolerate such a life? Which family's daughter wasn't frivolous? Mo Yunxi, who had transmigrated into this world, had been fighting with his stepsister, angering his cousin, abusing his aunt, and opening a few shops to lead the fashion trend in the capital. His life had become more and more unrestrained. However, why did a certain rumored temperamental and violent War God Marquis come to provoke her every day? "Since Young Lady has saved this Marquis, this Marquis has no way to repay her, so I can only devote myself to her." Mo Yunxi facepalmed." Lord Marquis, this is not good…The plot is fictional. Please don't imitate it." ---------------------------- " My Sister Has Been Strange Lately " was a light novel written by the author, Flying Mustache. It was a fantasy novel. The general plot of this novel was: Tang Xizai had two younger sisters, one of whom was a Japanese girl named Kitsuki Kamijen. ---------------------------- " The Cute Concubine Is Spoiled " was a fantasy romance novel written by the author Chu Xiaochu. The general plot of this novel was: After transmigrating, Yue Qingmo's father didn't dote on her and her mother didn't love her. However, it didn't matter. He still made a fortune and took in underlings, showing off and bullying scum. You asked her why? Other than the fact that he had a divine beast and unparalleled abilities, it was naturally because he had the black-bellied and proud Evil Emperor openly doting on him. Yue Qingmo said,[I went to heaven last night.] "Alright, I'll bring it up now." "I want to save the world." "Alright, let's first unify the Three Realms." ---------------------------- The book " Glorious Under the Moon " was a fantasy romance novel written by the author, Seven Stained by the Wind Stranger. The general plot of this novel was: She was reborn in the other world with the memories of her previous life. She had grown up in an aristocratic family with the God's Mark. He was born in response to the moon, but because of a divination, he was expelled from the family. Wandering in the forest, in the academy, on the battlefield, never yielding. Because she said," I will decide my fate. Destiny? Let it go to hell! I have the final say in my man. Are you courting death? Emperor? Becoming a god? Who cared! ---------------------------- " Reborn Fierce and Cute Female Lead " was a modern romance novel written by the author, Xixi. The general plot of this novel was: "Hey, who are you?" "Your man!" "Oh!" "Then who am I?" "My master!" “…”。 ---------------------------- " Matriarch Shocks the World " was an ancient romance novel written by the author, Flaming Blood Kite. The general plot of this novel was: She was the CEO of the Yue Group, who dominated the business world. She was also the young lady of the underworld who made people's faces change when they talked about her. She was supposed to have boundless glory, but unexpectedly, an accident caused her soul to travel to another world, and she fell from the peak to the silly youngest daughter of the Moon Prince Mansion. Her lowly status as a concubine's daughter and her foolish behavior made her a stain on the Moon Prince Mansion and a laughing stock for the world! However, after laying dormant for several years, he woke up one day. She let the flames that filled the sky wash away all the humiliation. Looking at the burning redness in her eyes, she smiled coldly. From then on, there was no longer the Yue Prince's Mansion in the world, no longer the Yue Family's crazy daughter. When the king returned, she arrived in a colorful dress. At the age of six, she was able to sit firmly on the position of the mistress of the Xiao family. The world changed colors. From then on, countless men and women were crazy about Yue Qingyan! ---------------- recommend a friend [Demon Taming] [Husband is very difficult to deal with] by Falling in love with the sugar fruit phoenix flame by Yan Qingxian. ---------------------------- " The Queen of Feng Zhou " is an ancient romance novel written by the author, Ming Zhu. The general plot of this novel is: Everyone knew that there were two young ladies in the Fenglin Country's Chu family. The first young lady, Chu Qingyu, and the second young lady, Chu Qingwan. They were both top-notch ladies in the upper-class society. They were dignified, handsome, and elegant. However, no one knew that the Chu family had a third daughter of a concubine, Chu Yuexi, who had been hidden away. In the 38th year of the Fenglin Calendar, Chu Ruochen, the master of the Chu Manor, died in battle. The Fenglin Kingdom was destroyed by the Wind Kingdom. Chu Yuexi was chased out of the Chu Manor by the eldest daughter of the Chu Manor and was beaten to death. When she was on the verge of death, she was possessed by the 21st century killer Chu Yuexi. Through a soul conversation, she told her difficulties to the 21st century Chu Yuexi and asked her to avenge her. He wanted to see how Chu Yuexi practiced martial arts with her genius master and ascended to the heavens, how she used her personal charm to conquer the Wind King, Nangong Yufeng, and how she took revenge on the scum who had hurt him and the original owner!

I don't know of a novel that fits your description perfectly. This type of novel is often called love horror or love restriction. There is a special emotional connection between the male and female protagonists, but they don't allow the female protagonist to date or be in love with others. If the female protagonist breaks this rule, she will face punishment or be trapped in a strange world. Although this kind of novel may be rare, there are some such novels. You can search for the relevant novel title or keywords to find inspiration.

😋I highly recommend " My Beautiful Sister's Teacher " to you! This light novel was about a male protagonist sending his sister to school, but he met his ex-girlfriend, who turned out to be his sister's class teacher! The relationship between the siblings here was not ordinary! I hope you will like this novel.😗

The story was about the eldest daughter of the Duke of Shang who was appointed as the Fourth Princess Consort. She was supposed to be married by the imperial edict, but she was poisoned by her aunt. The younger sister married for her elder sister. The protagonist was unwilling to give in and the fallen daughter made a scene in the capital. In the end, she either died or took back everything that belonged to her. I recommend this novel to you. It will definitely satisfy your taste in ancient Chinese. I hope you will like this fairy's recommendation. Muah ~😗😋