This is based on a true story. At the end of the manga, there's an interview with the real guy who inspired it! I've read the interview, and he seems like a really lovely, considerate, caring, unselfish and honest person - the kind I could be friends with - so I want to read his story because he deserves happiness and I want to check that it's a happy story! I'm sure he is happy, though, as he seems quite cheerful and optimistic, despite having attempted suicide as a teenager, before coming out.
Tatoeba Konna Koi no Hanashi