I admit, trailer didn't ring a bell for me. Too caothic. No more. I love every facet of this 1st episode. The narrator voice, the actor, the choice of them. Leader male actors are perfect. Good choice of music.
The start is like a bomb dropped to audience, after that there is a full immersion in the life of the carachters.
So perfect timing. Finally something a little different. Not the usual... "sorry I like girls" situation.

I'll sure write more after 2nd episode, but I think this is a prokising start for a funny and lovable drama. I always wish to read the novels, but english translation arevthe worst possible.