just to be sure, did you read the prequel?
http://www.mangago.zone/read-manga/i_episode_0/
I've seen some people that didn't read it so just to make sure :'>
I so agree! It's one of my faves.... its really super nice... the art and story is really great. I always fall in love everytime I read it and still excites me... Their love story is just so extraordinary... ლ(´ڡ`ლ)
If you wanna read something similar or almost... I can't give you much but you might wanna read these:
Killing Stalking, Caste Heaven, Acid Town, Saezuru Tori Wa Habatakanai, Color Recipe, Unfather, Blue Lust, Blind Love, Ai O Kou Kemono, Immoral Curriculum, Tsume to Toge, Okane ga Nai, Finder Series, Hogu Hagyeongsu, Royal Servant, Mistumei (subtle dark but the art is really good), In the cage (omegaverse), Moritat, a Thousand Cranes, Night milk heads (prequel) and Night Milk Heaven (sequel), Kurui Naku No Wa Boku No Ban (prequel) and Kurui Naku no wa Boku no Ban Beta (sequel and ongoing)...
hmmm... so far that's what I can remember... Hope you enjoy reading them (if you haven't read them yet ^_^)
hey does anyone know a manga similar to Itou-san? I like the dark theme in it a lot... I NEED MORE ლ(ಠ益ಠლ)