Hitorijime no Jouken
Complete | Nakata Akira | 2000 released
I really loved the 3rd couple. It was these two guys who I kept confusing for each other, they were neighbors. The 2nd couple was a pair of hosts, they were cute too. The 1st couple were coworkers where one was very dependable and the other a playboy with boys.
Samishigariya no Love Letter
Complete | Nanoka | 2014 released
Ch 1- 2 a chocolate box where the main character and a guy in the past exchanged letters Ch 2-3 (my favorite) a delinquent looking boy and a cute smol boy. The smol is clueless and the tol boy just wants to be cool and loves smol boy. Ch 5 age gap of 10 years where the child wants to marry the other in the future
Gosan no Heart
Complete | Ogawa Chise | 2012 released
Love the first story and I think i liked the 3rd one as well idk I havent checked
Katekyo!