Yes i read a manga ways back and i forget the name. I remember there was a boy and a girl when they were kids used to play in a house with there other friend(boy) and something happened and the house catches on fire and he dies, well the main character shuts out those memories and forgets them till he meets the girl again and she keeps telling him she cant date him or like him till he remembers what happend.

Pretty sure it's Open Sesame

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Fearless to the point of failing exams
Hobbies include crying in the shower after failing said exams