Okay shit is about to go down and this is a real cliffhanger. MONKE like this. Also very happy for young su, he finally found a keeper and she finally found herself a friend (maybe more than that in the future 😉)
Nah you see it was heavily implied past 2-3 chaps something bad happened to his sis(her clean room in a house where he lives solo and cosplay knowledge in past tense) I thought she died or something.