Yabai Kimochi  

ヤバイ気持ち

Let me rephrase your text to make it more concise while retaining its meaning. Tooru is a quiet student who has developed a crush on his popular friend, Ryouji, from the high school swim team. Although he hides his feelings in front of Ryouji and acts like just another friend, Tooru's world turns upside down when Ryouji reveals a secret desire for him. Excited, Tooru accepts Ryouji's offer but later realizes that their affair was based on Ryouji's sexual curiosity. Tooru confides in his close friend Kashiwazaki about his dilemma and they devise a plan to test Ryouji's true intentions by faking a romantic relationship. However, things don't go as planned when Ryouji becomes jealous and tries to pry Tooru out of Kashiwazaki's arms. It turns out that Kashiwazaki wasn't really faking, leaving Tooru confused and frustrated. Both Tooru and Ryouji have kept their feelings hidden from each other in the past, but now they realize that they were not alone. The outcome of their relationship remains uncertain as they navigate through their true feelings for one another.

Yabai Kimochi was published in English as Desire by Digital Manga Publishing on November 1, 2004. It has also been published in German by Carlsen Verlag.