Alternative Name: オトナの証明;恋爱身分证;Erti Kedewasaan

Genre(s): Romance School Life

Demographic: Shoujo

Summary:
Tsubaki always appears experienced, but actually, she has never had a boyfriend even though she's already 16, and she's a real baby. She want... MORE Tsubaki always appears experienced, but actually, she has never had a boyfriend even though she's already 16, and she's a real baby. She wants to quickly increase her love experiences, and become an adult! One day, she got called out by her math teacher, Shiina-sensei, and she was told that she'll have to take supplementary lessons. All alone in the math room with her sensei after school, Tsubaki's heart beat like crazy when she saw Shiina-sensei's facial expressions that were different from usual...? HIDE