Help , I need to found a title

[true_readerr]

Let me tell you the plot: it's a blonde male protagonist, he is young and goes to college to a ....mix of medieval yet technologically advanced world. He has two friends, a girl and a boy, he is the preferate of teachers. But lately he has nightmares about eating people, and dreams about his eyes going golden(his eyes is purple). In this world golden eyes are a curse, it meant to be a monster, every golden eyes People were cannibals and were killed. The protagonist feels something wrongs and tells his friends. He has doubt and tells his teacher (favourite) but got knocked out by him. His friend meanwhile he was away search the teacher office and discovered a base where experience were made. They are disgusted and the girl has a flashback how her mother got taken by the teacher for the"greater good" has her mother was transformed and had golden eyes. The protagonist woke up succeed to escape and joins his friend on a boat . They get in somewhat of a fog, purple one and the protagonist sees like a golden eyes goddess. They cross the fog and the protagonist wakes up alone on snow. It's the first time he sees that. He sees the boat disappeared and there was no sea behind him but a wall. A giant wall with breaks....the protagonist is hungry eats a rabbits and he's dying of cold. He walks and sees the world is different then his. The city and building bruts. Like communiste style, and he almost got robbed or...got robbed I don't remember this part. And fell asleep on stairs... Some guy sheltered him and got surprised about it....the guys is nice but not smiling, he's annoyed but he does that for his sister who suggested to take the protagonist in their home. Some times pass , he got reunited, a fight broke out , he almost bit his friend...they get somewhat back to their motherland...and many things happened but I don't remember, the ending is the protagonist disappear in a flower symbol and peace goes back.
Please what's the title??? It's been a while, I can't find it. Thanks in advance