All or Nothing by Leighann Harvey, Shikke

The last thing Oka and Sawada expected to find out at lunch was that their two friends Hasumoto and Kadoi were dating.The four boys were classmates, friends, and even neighbors in the dorms. The sudden revelation sparked something within Oka and Sawada―as they begin noticing each other in new ways. But what started as playful curiosity quickly grows, and each moment the two spend together threatens to bring them closer than they’ve ever been before…