藍城 満留

A girl whom Kento meets at a coffee shop on his school trip, they meet again three years later in his hometown. She likes to drink in order to make up for her feeling of homesickness and loneliness. After the place where Kento works part-time suddenly goes out of business, Michiru hires him as a live-in housekeeper.

She is the heroine of the official novel Koi ni wa Amae ga Hitsuyou Desu feat. Aijou Michiru and short story Michiru-san no Valentine, Michiru-san no White Day.