I watched this for the first (and only) time when I was a teenager and got rejected by my oneitis crush, it was fucking brutal. It should be renamed to teenage love is the only thing that matters in life: the movie.
If you hate yourself and want to watch something even more suicide-inducing, go watch Clannad and Clannad: After Story. The MC is a depressed nihilist who has nothing to live for (so basically every teenage incel) but then he gets a qt shy girlfriend from high-school who basically makes his life worth living and marries her. I watched that one when I was 12/13 and wasn't blackpilled yet and I actually thought my future was going to be like that JFL.