It's about two guys who are working in the same convenience store, and one of them seems to be strangely attracted to the other.
(taken from the Evil Empire)

From Storm In Heaven:
It's all the little things that Ikeuchi does that makes Shinoda want him. Shinoda's been gay for as long as he can remember, but he's still a virgin. Then he falls in love with Ikeuchi, a younger man on the same basketball team. However, Ikeuchi has a girlfriend... is there any way Shinoda can make him want him?

from the back cover of vol. 1:
"After graduating from high school, best friends Tachibana and Otani decided to move-in together as more-than-friends. Although their feelings are very real, the secret nature of their relationship, and the words that have gone unsaid between them, leave room for doubt. When a chance encounter reintroduces the pair to Yuki, a former classmate, Otani becomes suspicious of Tachibana's close friendship with her. Will rumors from their high school days together spin Otani's insecurities out of control? Or could it be that Tachibana and Yuki really have rekindled an old flame?

Vol. 1 also contains two unrelated oneshots, "To the Ends of the Earth" and "Waiting for Spring" and a side story, "Sho-kun" about Tachibana's friend Shogo and his American boyfriend Al.

Vol. 2 goes back to high school when Otani and Tachibana became friends and then more. It also contains another side story about Shogo and Al, which is a continuation of their story from vol. 1.

Hiro and Ritsu have been friends for over ten years, but Ritsu's terrified that Hiro will get scared off if he realizes Ritsu's feelings for him. Although they don't seem to have much in common anymore, Hiro still stays overnight at Ritsu's place every time he has a business trip to make. All Ritsu needs to do now is figure out if Hiro actually means anything by it...
(Source: Vices & Devices)