Maybe the character in the comic feels jealous because of the popularity or success of the BTS boy. Or it could be related to a love interest. Hard to say exactly without more context.
It could be due to various reasons like competition for attention or a perceived threat to their status.
The reason for the jealousy could be something as simple as a misunderstanding or a complex web of emotions and circumstances. It might be that the BTS boy has something the comic army x boy wants or has achieved something that makes him feel left behind.
The best chapter pointer here is Chapter 206, "Miss Su, Thank You So Much!". It opens with Five minutes later, Xingxing led Ah Fu out of the room by the hand. and closes on He was the oldest of several siblings and the most understanding of human....
Look to Chapter 246 for the clearest answer. It begins with At that moment, not only Su Yinwan but also Shang Shaojing's complexion..., keeps building through Beside them, Shu Yan wore the shocked expression of someone who had got..., and lands on Your phones have also been placed at each of your.
Chapter 237 is the strongest chapter-level answer because it starts from It seemed as if, believing the spilled water couldn't be recollected, Ah... and follows through on The netizens responded in chorus, and no one insisted on forcing Jiang Li....
Chapter 220 is the strongest chapter-level answer because it starts from I know everyone has many questions, and I'm here to answer them one by... and follows through on However, Su Yinwan and Shang Shaojing weren't particularly attentive to....
The best chapter pointer here is Chapter 230, "To use one's own method against them.". It opens with Shang Shaojing's expression wasn't looking too good either. and closes on If he knew that your stepmother was secretly prompting you towards a....
Look to Chapter 232 for the clearest answer. It begins with But soon, she suppressed this strange feeling and slowly began to speak,..., keeps building through I'm the oldest, so I should get this chance!" "Get lost, I'm the youngest..., and lands on The moment he saw the information come through.
If you want the clearest chapter reference, go to Chapter 223. Early on, So, for the first time, Jiang Yan, who had always styled himself as the...; later, the chapter leans on My good little sister, I'm begging you, help me figure out how to avoid....
The best chapter pointer here is Chapter 207, "Keep these thirty points for yourself, I don't need them". It opens with After finishing, Sister-in-law Lan quickly took out the Good Evaluation... and closes on She had taken care of them for a longer time, she hadn't even had lunch,....
The best chapter pointer here is Chapter 254, "Madwoman! She is definitely a madwoman!". It opens with Just when everyone thought that Jiang Yan wouldn't last long and would... and closes on A Jiang Li whose head was only filled with books and who never joked or....
The best chapter pointer here is Chapter 274, "Post-Traumatic Stress Syndrome". It opens with Upon hearing this, Officer Xu became even more excited, but catching a... and closes on I believe with some rest, he will recover." Relieved at last, Hu Zi's....