Hug Kiss Akushu by MOTO Haruko [Eng]

Plot:

At his older brother’s request, Kazuyuki begins tutoring the art teacher, Kamisuwa-sensei, in English. However, he soon realizes that sensei seems to have feelings for his brother. A strange, uneasy feeling stirs within Kazuyuki—one he can’t quite understand. What exactly is love? Does it start with words before manifesting physically? As emotions grow complicated, Kazuyuki finds himself questioning his own heart.