I'm not sure specifically as I haven't read this novel. But from the title, it might be about a couple who have some sweet interactions or a relationship filled with tender moments.
One could be 'The Couple Next Door' which also focuses on a couple and has some heart - warming moments. Another might be 'A Sweet Love Story' which, as the name suggests, is about a sweet relationship.
In the novel,"A Daughter Married to a Royal Family", the male and female protagonists finally got married.
"Ink Rain Clouds" was adapted from the famous author of Yuewen Group, Qian Shan Tea Guest's "The Daughter of a Diwife". The original work was also very exciting. Click on the link below to start reading!
In Cherishing Hua Zhi, the male and female lead, Gu Yanxi, and Hua Zhi got married in episode 40.
On the second day of the wedding, the two of them gave up their official positions and traveled around for their honeymoon.
It is highly unethical. In a civilized society, we uphold the values of respect for privacy. A married couple has no right to peek into another couple's sexual stories. It can also cause harm to the relationship of the couple being watched, not to mention it is a wrong behavior in terms of ethics.
In many such manga, the couple might show a lack of emotional connection or passion. They could be together for practical reasons like family expectations or financial stability.