Twinkle
Two friends have this joke between them where they say each other I love you or I like you making uncomfortable to everyone around them. Until one day, one of them confess his feelings for real.
Chii-chan and Eno-kun
Eno is dumped by his girlfriend because he is really stupid and says inappropriate things the whole time. Chii has an obvious crush on him and is always phrasing Eno, who smiles every time with pleasure. Because of a kind of competition, Chii gropes Eno's pectorals and gets hard. Both develop a sex-friends relationship.
Odu-kun No Vita Sexualis
Multiple BL stories. 1. Best friends on their 30's start going out after one of them confess to having had feelings for the other since high school. 2. The classroom's otaku has a crush on the most popular guy, who turns out to be a closet's otaku. 3. Two friends start a non-declared relationship where they are more than friends but unofficial lovers.
Yamada To Shounen
It's a really lovely story, I nearly can't hold my feelings. Totally worth it. Chihiro is so cute and awkward and Yamada is the best. I do love this couple a lot.
Koori Ga Tokeru No O Matteru
Multiple BL stories.
Eigyou Nika!
Toujou and Ayumu are co-workers at the sales division. Ayumu is gay and deeply in love with Toujou and Toujou is childish but an awesome worker who always takes confidence in Ayumu's support. These two are the sweetest couple ever in this universe. Both are so pure and sweet and ilove the way they complement each other. It's a lovely manga.
Sensei ni nerawareteimasu