Koaka Head

Itou Takeru was highly unpopular in middle school, but one girl, Watase Nagisa, always treated him with cheerful kindness. Over time, he fell in love with Nagisa, though he never told her. He followed her to the same high school after graduation, determined that he would eventually confess his feelings for her. However, he didn't look at the chosen school too carefully, and he ended up in a special arts class with Nagisa and many other girls. He and his friend Yuto are the only boys in the class, but it isn't the paradise one might expect. Some of the girls are friendly, but some seem determined to make his life a living hell. Will Takeru be able to handle his new high school life, and will he ever tell Nagisa how he feels about her?

(Source: MangaHelpers)