Quote from calstine
Two - Jeremy's utterly irrational compliance to the sexual abuse. It would make sense if he and Sandra had nowhere to go -- but in America there were people who urged him to stay and promised to look after him! (Not to mention a girlfriend he obviously cares about quite a bit) He shouldn't have let his mother leave with Greg since he already knew what he was like beforehand ('cause the rape began before the marriage) He's trying to protect his mother's innocence by letting her get married to, and totally dependent (both financially and emotionally) on a sadistic guy like that?
Jeremy is a mentally and socio-psychologically normal 17-year-old - he's not a child! So those are really irrational actions which were obviously meant to just move the plot forward. They don't make much sense otherwise.
These were definitely my biggest problems with the manga. The manga works emotionally (how many times did this manga make me tearful ) but logically the manga is a mess. I can't realistically believe that a 16 year old would so easily sleep with his future step-father so that the he would stay with his mother. It makes no sense that he would want his mother to marry this type of man.
There was also the mother's multiple suicide attempts. Did no one think that the mother needed to get some type of help, like counseling? She tried to kill herself after her first husband died, but there's not mention of her getting any help. Becoming depressed after you lose a loved one is normal, but becoming suicidal should have raised some red flags. Then for her second suicide attempt, she goes to the hospital, the doctors say it probably isn't a suicide attempt, and just let her go.
Then there's Jeremy's behavior that no one really reacts to. The doctor makes no attempt to determine why he lost his voice, like temporarily losing your voice just happens out of nowhere.
There were also a lot of little things not related directly to the story progression that annoyed me. Like when Jeremy goes to school for the first time in England, a boy asks him why his last name is different from his brothers'. When Jeremy explains that they are step-brothers and that he and his mom came from America, the boy is surprised to learn he's American. The boy would've noticed the moment he started talking to Jeremy that he had an American accent. There were a lot of little details that made the manga so unrealistic.