I can read these mangas many times! I rate them >9.5/10 based on my own preferences, so there will be lots of non-mainstream BL
Genres: NO PWP, no doujinshi
Length: <100 chapters or 3 vols
Search by tags: http://www.mangago.me/home/people/12706/manga/1/
If you like this list, please click "RECOMMEND". Thank you XD
2nd list: http://www.mangago.me/home/mangalist/655038/
3rd list: https://www.mangago.me/home/mangalist/3746699/
(IF 1ST LIST IS FULL, I'LL MOVE OLDER ONES TO MY LIST 2&3)
Andrew has anxious attachment style (at least so far, I think)
I swear to God, the author really picture parting and moving on in a really beautiful way. Like both grandpa and taesun are ready to part ways, letting go each other and trusting their journey without one another beside them ;-;
In the raws Soongap still calling Bongchun "나리" (Nari) : Master
hehe just wanna give context since it's giving more nuance that he's still respecting him like that.
And it's like their love honorific for each other like Bongchun calling Soongap "색기“ (saeksi) : Bride (or as the official translation said: Darling) when they're get more intimate. (⌒▽⌒)
This is like Hannibal and Will Graham but Hannibal is bottoming. Loolimg forward for more ლ(´ڡ`ლ)