The older sister is really unlikeable. She's perfect at everything and therefore feels entitled to tell other people how to live their lives, including forcing people to commit to marriage when they're like 15-16 and refuses to allow any other form of dating. That is some extremely unhealthy absolute bullshit right there.
It was dumb but I was enjoying it until the last few chapters with the sister. That was some forced bullshit. Oh and surprise! She was secretly "testing" them all along
Dang, first people hated how long it was taking them to confess, and now people are hating the one character that caused them to confess to each other. Guess no matter what the manga is just trash in their eyes, huh.