Murai in Love(2018)

Murai no Koi

Murai is madly in love with his teacher, Tanaka. One day he dares to tell her that he wants to marry her, but of course, her answer was "No." Tanaka only loves Hitotose, a ninja boy character in her favorite otome game. But she didn't know that Murai looks so alike to Hitotose until Murai cuts his hair and dyes it blond. Now Tanaka must stay calm in front of her BIAS. Murai finds out about Hitotose, but he wants her to see him as himself, not some ninja boy... Cute and funny comedy about high-school boys, girls and teachers in Japanese high school!

(Source: BookWalker)

Note: Includes 10 extra chapters.