Manga that I kinda like

Multiple stories
possessive seme, slice of life

first one: childhood friend
The college student Akira is confessed to by Itsuki, his younger childhood friend. Akira always considered Itsuki to be his younger brother. After the confession, Itsuki keeps acting as usual, as he did before he talked about his feelings. Akira gets confused by his unchanging attitude and every time Itsuki gets close/touches him, Akira's heart beats faster...

psychological, drama, seme falls first, obsessive psycho seme, open ending

Childhood friend+rich/poor+marriage ?

Sign me up babe

old-faced seme, school life, senpai x koukai

school life, shy dog-typed seme (royal+protective), school prez popular uke
uke takes lead in the relationship

Retsu, the high school karate club captain, has been in love with the student president, Kaji Shogo since junior high. He even went as far as volunteering as the student body secretary in order to be close to him...

spin-off to manga above

2 couple : 1st couple vice-prez (uke) x his friend (vice-prez has many experience) kind SM couple which is S uke x M seme

2nd couple : step-brother (NOT incest)

sequel to 2 mangas above

college life, slice of life, contains all three couples

baseball (idk shit about baseball but it's not quite hard to read)

fat fetish (or is it not?), appearance makeover (seme), tragic past (uke)

Multiple stories

(1) cousins, age gap 2 years, model/celebrity seme x ordinary uke, slice of life, kinda cliche (//∇//)

(2) ch.5 : one shot about businessmen +aggressive seme