Ryouka is actually irritating me ngl, I get that she's your big sister and all........but they both have mutual feelings for each other, they're BOTH unhinged/yandere for each other
WHY TF DON'T YOU JUST MIND YOUR OWN BUSINESS?????
Sure and to double down, you "date" the guy your sister clearly rejected just to give him the false hope that he'll end up with Sayuki, so you make the whole entire trip awkward for everyone.......selfish ass bitch