u/Upper_Equipment_5142

Hello everyone. I recently read Hanamizuki by Rocinante (4 chapters, ongoing) and it really clicked with me. I want something like that but I don’t really know how to call it properly. Slowburn? Suspense? NTR bait? When you as a reader aren’t certain if NTR will happen in story and it hits a like truck if it does or comes as relief if it doesn’t.
Few more examples are: Grapara! (Until that infamous chapter, if you know you know), Itaiamai, Honto no Kanojo.
Sorry if it is confusing, I’m still new to the genre. Thanks for any recommendations and help!

Specifically when the MC and the girl aren’t in a relationship, but he’s in love with her, while she's doing it with someone else.
Not necessarily full-on hentai, but preferably.
I find out it hits me hard like a truck, yikes.
Examples: 638243, 651473, Daredemo Dakeru Kimi ga Suki, Soredemo Ashita mo Kareshi ga Ii (they in relationship here but it still hits because he's against it).
Thank you for suggestions!