Lily

https://www.mangago.me/read-manga/sweetie_sweetie_sweetie/
https://www.mangago.me/read-manga/don_t_press_the_button/
https://www.mangago.me/read-manga/possessed_by_a_cotton_ball/
https://www.mangago.me/read-manga/the_fallen_duke_the_knight_who_hated_him/
https://www.mangago.me/read-manga/turning/
https://www.mangago.me/read-manga/eternal_covenant/
https://www.mangago.me/read-manga/to_deny_the_route/
https://www.mangago.me/read-manga/regas/
https://www.mangago.me/read-manga/love_supremacy_zone/
https://www.mangago.me/read-manga/i_can_see_your_stats/
https://www.mangago.me/read-manga/necromancer_survival/
https://www.mangago.me/read-manga/stigmata_1/
https://www.mangago.me/read-manga/kiss_the_abyss/
https://www.mangago.me/read-manga/to_be_or_not_to_be/
https://www.mangago.me/read-manga/silver_diamond/
https://www.mangago.me/read-manga/the_affairs_of_the_other_world_depend_on_the_corporate_slave/
https://www.mangago.me/read-manga/zettai_bl_ni_naru_sekai_vs_zettai_bl_ni_naritakunai_otoko/
https://www.mangago.me/read-manga/kocchi_muite_glare/
https://www.mangago.me/read-manga/doku_wo_kurawaba_sara_made/

Have you read any of these?

Stuck in my sister's dating sim

breaking through the clouds 2: swallow the sea
divorced actor picking up garbage
sweet desire the cold lord god who can tease coax and act coquettish
my four masters
little mushroom
don't pick up boyfriends from the trash
mr. Dior
(btw all but one of these are manhuas, my four master is a webtoon)

Read these two in this specific order, tho not a sequel they're kinda connected, also don't be put off by the art at the start, it changes for the better in just a few chapters :

Song of Reverberation
https://www.mangago.me/read-manga/song_of_reverberation/

The Promise
https://www.mangago.me/read-manga/the_promise/

here's a few I quite like x

- 11:59 ( https://www.mangago.me/read-manga/11_59/)
- Yuutousei wa Unmei no Akai Ito ni Sakaraitai ( https://www.mangago.me/read-manga/yuutousei_wa_unmei_no_akai_ito_ni_sakaraitai/)
- The Two Lions ( https://www.mangago.me/read-manga/the_two_lions/)
- Where the Dragon's Rain Falls ( https://www.mangago.me/read-manga/where_the_dragon_s_rain_falls/)
- Dream Away ( https://www.mangago.me/read-manga/dream_away/)
- Someone else's BL Manhwa ( https://www.mangago.me/read-manga/someone_else_s_bl_manhwa/)
- A Shoulder to Cry On ( https://www.mangago.me/read-manga/a_shoulder_to_cry_on/)
- Keep Holding On ( https://www.mangago.me/read-manga/keep_holding_on/)
- Bad Contact ( https://www.mangago.me/read-manga/bad_contact/)

and I know you said you don't want super well-known stuff but I simply can't write a shounen ai rec list without including: Heesu in Class 2, Here U Are, Salad Days, The Summer Hikaru Died, Semantic Error and Lost in The Cloud hahah

Hope you enjoy xx

oops I didn't read the question properly and included 3 mangas! sorry ab that xx

https://www.mangago.me/home/mangalist/2857187/