Otona no Manaa – Suzuki Tsuta

Six months ago a book store manager taught high-school student Minami a lesson about loitering and gave him a job. Since then Minami finds himself slowly falling in love with his strict and sometimes violent manager.  

High school boy tries to convince older man about his feelings. High school boy can’t wait to turn the tables.

(source: http://www.mangahere.co)