COMPLICATED STORY
This, you need to read further as it develops it starts off very badly but its actually a good story if u keep on reading.
it will explain what happen to him thats why he bcomes like this. i also think it was a very bad beginning but i skipped and saw there was a happy ending so i went back to read it from the front. both of them had a bad past.
Kurui Naku No Wa Boku No Ban