
They could be blood related.. like one comment said there's no such thing as joint custody in Japan so when you divorce, the kid looses all contact with the parent who doesnt have custody. But what's weird is how the older bro didn't recognise the younger one till he told him his name. There were many times when he saw the full name like when they were assigning the rooms to the first year and we also saw that their rooms have the full names of the students who are occupying the room and he's also the dorm leader. Yet he still didn't know what the younger guys full name was till he told him? Also they were writing to each other until 3 years ago and I'm sure they were using their full names and the older bro still recognise his name? Hmm now in the next chapter if we find out the mom remarried and so the younger bro had to change his last name this will make sense but for now it seems like a big plot hole.

When they were exchanging letters, Kaoru's name had already changed to Hasegawa (most likely the mum's maiden name). Kaoru's name is now Yano (likely from remarriage) so I can understand why Izumi wouldn't think twice until Kaoru emphasised it + nostalgic scent. With regards to not physically recognising the younger bro, it's been 7 years since they last saw each other. Maybe they never exchanged pics? Also, Kaoru's changed a lot (much bigger, different hair colour, etc) so I can understand not recognising him.

DISGUSTAAANG. I don’t want to keep seeing the husband and the bitch maid bang every episode. Honestly the plot could move forward more if the author didn’t keep drawing sex scenes between those 2 (maid & Carter). Also Isaac better control himself and tell Giselle what’s up next episode because I don’t want to see her going slowly mad ╥﹏╥
Wow this is so interesting! I hope its not tragedy though ╥﹏╥