ML is actually in highschool. suddenly one day his dad tells him he's engaged. he's shocked. when fiancee arrives, she's actually so pretty, with long bluish purplish hair [memory fuzzy]. she lives with them. they later find out she's got an anime action figure hoarding condition developed from her depression. anyways she helps him with school drama and they even get an apartment together but he tells her he can't be intimate with her yet because he's still underage. and she accepts it but then she gets kinda frustrated. so the manhwa really highlights the differences in an age gap relationship and how they still end up with each other. so anyways she gets a job because she's an adult and like there's an after work getting drinks scene and she gets home drunk and then there's probably a tiny fight among them. so basically the author is going to drag out the drama till he turns 18 maybe. please please i read it somewhere and I LOST IT UGH
OMG I FOUND IT: https://www.mangago.me/read-manga/cohabitation_with_the_fiancee/
omg so like utneunhae is the artist for this hongshi manhwa right? the thing is, utneunhae also was the artist for "strawberry and milk tea" manhwa. and when i first read straw, it was love at first sight. so it took me years to find the next remaining free chapters of straw. years i say. so anyways today i come across hongshi and it doesn't even take me a second to clock it that it's the same artist. i check and omg lo and behold! anyways it feels so exciting because i get to experience this art style again