Love 2 Quad - Season 1

Based on the erotic game by Marmalade, this story begins when Wataru, a student at Akakura Gakuen, is approached by his popular teacher, Aoi-sensei. She reveals herself as an agent for Cradle, a secret international defence organisation, and informs him his immediate assistance is required, demanding he remove his clothes. The enemy known as "4D" must be combated, and to achieve this, Wataru must perform ecchi activities to accumulate the necessary energy, ultimately wielding the power of love to secure victory. Several allies join his cause: his childhood friend Honoka, who is like a younger sister, his classmate Ermalit, an expressionless girl from the future named Mirai, and a diminutive girl from the past called Chitose. A degree of uncertainty prevails, however, as the group is not entirely sure how to proceed. This development brings Wataru's formerly peaceful life as a single individual to a conclusion.