Sensei wa Butchozura Shite Yatte Kuru
Dos Obake Ga Nekasetekurenai
One of my personal favourites. Non-con as heck especially in the beginning, but Kousuke probably has one of the best looks of "desire" in any manga. Every time his switch is flipped, either as ghost or human Kousuke, it's fantastic. Was one of my earliest experiences with non-con fiction, and honestly, it got me into it.
Soredemo Sekai ha Utsukushii
Watched the anime first and fell in love with Livi and Nike. Manga version is just as lovely. Don't let their age gap stop you, they're both pure on the topic of love (regardless of how mature Livi acts lol).
Bokura ga Koi wo Ushinau Riyuu
Sequel to Yukidoke, about Sumito's friend Ou-chan.
Tamachen!!
I LOVE THESE PLOTS SO MUCH AND NON-CHAN IS THE FUCKING CUTEST-- Nonchan would fit as a shoujo manga protagonist all by himself good lord
Nekota no Koto ga Ki ni Natte Shikatanai
I love Mikki, but her absolute innocence (pretty much ignorance too lol) sometimes made me worry if things would turn out okay. It did try to stray clear of the melodramatic love triangle though, which was good. Nekota is absolutely adorable, both cat-faced and not. I would love to see more of their adventures in high school and beyond, but without his cat-face, I fear that it just wouldn't be the same!! (Haha) Love them either way and an adorable series that I would re-read any time.
Kanojo Ni Naru Hi Another
Sequel/Spin-off to Kanojo ni Naru Hi, with special cameos from Mayama, Miyashi and Miki from that series.
Kiss Mo Dekinakatta