Moriyama, a university student, is secretly falling in love with Kayama, his cool neighbor guy. Once, Kayama saw Moriyama arguing with some gay, he confess his love to him. How will look like relationship between straight guy (Kayama) and Moriyama?

The cheerful and affectionate Hidekazu, and the thoughtful and genial Eiji. They were my old neighbors, the super popular twins. I, Ueto Shun, am in love with the younger twin, Eiji. We study at the same university and share an apartment, although I do not pay the rent... I live under the same roof, but... I am in trouble! I'm happy, but I find it problematic... The excitement of living with the person I love. I have to add that his older brother, Hidekazu, falls for a tsundere at first sight.
(Source: Girls' Generation Scanlations)

From Yaoi Is Life:

Watanabe Chris is a high school teacher.
When his father remarries, he finds himself with an English stepbrother named Wataru. Shortly after Wataru transfers to the school that Chris works at, their parents die suddenly in an accident. Chris and Wataru begin to live together, and before long they fall in love.
Wataru enters his second year of college still living his happily-ever-after with Chris.

At the same time, Wataru's childhood best friend and former suitor, the cross-dressing Rei, is falling for Yamada, who's always secretly had a crush on Chris...!

Sanpaku-eyed Emu Ikariya is a young man who has known poverty and hardship since childhood. After the sudden death of his alcoholic father, he is approached by a loan shark who informs him that he has inherited his father’s debt. Just as he is being coerced into dubious work to pay it off, a face from his past appears with a shocking proposition.

(Source: Hero Scans)

Teijin Sakuichi was born in a house of one of Japan's leading conglomerates while Ryota Kishi was born and raised in a common household and lived a rather crude lifestyle. Despite this difference, they were neighbors and childhood friends that grew up together. However in the winter of their third year in middle school, Sakuichi proposed to Ryouta before going to study abroad. Years later, having no contact, Sakuichi suddenly appears before Ryota completely changed. Has Sakuichi forgotten all about Ryota and their proposal!?
(Source: MU)