chut did not have a redemption arc, was consistently a bad brother through out the movie and did not have to grovel at all cause the sister jane forgave him as soon as he finally showed up and was always ready to forgive him for all the awful things he did to her and to moji as well.
he literally did not even do one nice thing since childhood for his sister and made her life super difficult and always without fail disappointed her so much that I wanted to scold her for still having hopes on him.
she was always there for him but he was NEVER ONCE there for her. like after a series of disappointments from him jane's ONE request was just not get drunk off his ass and show up for her wedding where after she was going to give a speech about how much he means to her but nooooo he can't even do that because he finds out that his sister secretly helped him get a job after he was fired from his previous job which by the was was completely his fault cause he was super unprofessional and lost a major client for his company(he insulted the client company a lot cause they didn't like his pitch, then when he got caught by moji who is one of the people incharge there he blackmails him to keep his mouth shut or else he is going to make his sister break up with him but gets caught anyway which leads to moji's transfer back to japan and him getting taken off the the pitch) and was secretly drinking in the office.so he kept feeling sorry for himself and got drunk and missed it.
I was waiting for flashbacks or something to show us that he was secretly helping and protecting her but that never came and instead we got more flashbacks of how the sister was always supporting and protecting him when he thought she was making his life difficult, which just cemented the fact that the chut has a massive inferiority complex.
her life would have been sooooo much easier and better if he wasn't there.
the only reason to watch this movie would be for jane and moji cause love story was cute and he was the perfect boyfriend and does not deserve a brother in law like chut he never even apologized to him for treating him like shit but then again he never even apologized to his sister properly so want can i expect , jane she did not deserve a brother like him. keep in mind that the stuff i mentioned here are not even half the awful stuff he did to them.
if it wasn't for the brother i probably would've given it a 8 or a 9