Forgot the names will update once I reread
1. Tone x Makoto
original: Tone to Makoto wa Tokidoki Koibito
sequel:Tone to Makoto wa Honto no Koibito
^ NOT ON THIS SITE (but a group did scanlate it but don't think you can find it anymore)
2. Fuji x Jirou (friends of Makoto and Tone)
spinoff: Kare ga Masuku wo Hazusu Toki
i forgot their names will update when I reread
1. Keisuke x Shinoda (main couple)
2. Katsumi(main couple’s friend) x Aramaki (school nurse) (minor couple)
original: https://www.mangago.me/read-manga/jackass_sawatte_ii_tte_dare_ga_itta_yo/
3.Hosaka (minor couple’s friend) x Miyoshi (unrequited love for Katsumi)
spin-off: Hosaka-san to Miyoshi-kun
Ch 1-3,6 shinomiya x sumi (classmates)
Ch 4-5,7 sunohara(writer) x motoi(editor) (sumo’s parents)
1. Suu x Aku
https://www.mangago.me/read-manga/memeshii_aku_to_azatoi_suh/
2. Tanaka x Kou (classmates/friends of main couple)
spinoff: Zutto Kimi no Turn
Ch 1-2 Hoshiuchi (angel) x Kuoishi (devil)
Ch 3-4 Arima (angel) x Saeki (devil) (first couples coworkers/friends)
Ch 5 both couples
1. Liam(β) X Oliver(Ω))
https://www.mangago.me/read-manga/kimi_wa_mu_kamenai/
2. Oscar(⍺)(Oliver’s younger brother) X Luca(⍺)
Boku wa mada kamenai
1. Oto x Sora
original: https://www.mangago.me/read-manga/everyday_love_me_more/
2. Ryu (Sora's friend) x Reo
spinoff: Koi o Egakeba Iro ga Saku
1. Hyeonwoo (⍺) x Minjae(Ω)
OG: https://www.mangago.me/read-manga/still_i_like_it/
2. Colt (⍺)(Minjae’s employer) x Damon/Jinwoo (⍺)(Minjae’s ex/Hywonwoo’s older brother)
Do You Still Like Me?
I forgot this was a spin-off, but think this one is a lot better.
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The EFFORT YOU PUT IN THIS LIST IS IMMACULATE jdjdididudueidiej