Mars's activites

At first, Yona gave some major side-eye to the popular game "Concubine Walkthrough" until ...

'Can you buff me?'Monaka, who looks like a top-tier experienced player at a glance, offers...

Historical / Isekai BL II:
https://www.mangago.me/home/mangalist/1594530/

Historical / Isekai / reincarnate BL III:
https://www.mangago.me/home/mangalist/2728331/

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)

Isekai BL 
Reincarnation, Transmigration
Reincarnated in Another World
Reincarnated in a Game World 
Reincarnated in a Book World 
Transported to Another World
Reincarnated Lover 
Multiple Reincarnation 
Reincarnated in the Past 
Time Travel
Time Rewind

Isekai BL 
Reincarnation, Transmigration
Reincarnated in Another World
Reincarnated in a Game World 
Reincarnated in a Book World 
Transported to Another World
Reincarnated Lover 
Multiple Reincarnation 
Reincarnated in the Past 
Time Travel
Time Rewind