There's a gap in Yuta's memory, and I hope he figures it out. Yuta despises Seunghyun because he thinks Seunghyun never came to save him when Yuta needed him most, but that's not true. Seunghyun did save him before, but Yuta didn't want to be saved, and I think Seunghyun tried to force him to stay. That's why Yuta remembers Seunghyun's ceiling in his apartment; he just doesn't remember the rest.
There's a gap in Yuta's memory, and I hope he figures it out. Yuta despises Seunghyun because he thinks Seunghyun never came to save him when Yuta needed him most, but that's not true. Seunghyun did save him before, but Yuta didn't want to be saved, and I think Seunghyun tried to force him to stay. That's why Yuta remembers Seunghyun's ceiling in his apartment; he just doesn't remember the rest.