Grisaia no Rakuen

Synopsis

Asako tells JB that Yuuji is no longer a virgin and that they have been doing it many times since his birthday. Asako convinces JB to also sleep with Yuuji and prevents her from backing down. Sometime later, when Asako's health begins to deteriorate for an unknown reason, Yuuji ends up taking her place at some missions, which greatly upsets JB when she finds out. Eventually Yuuji decides to also work for the same organization as Asako, and JB eventually agrees. Yuuji and Asako travel to America and Yuuji is enrolled at a military academy, where he befriends the slightly older Daniel Born. Yuuji ends up constantly helping Danny with his training. When Yuuji wins the first place in marksmanship, he is challenged by second place winner Milliela Stanfield to a shooting contest. When Yuuji makes a shot thats impossible to Millie, she falls in love with Kazami and starts following him everywhere. Yuuji, Danny and Millie are eventually assigned to the same platoon.

(Source: Wikipedia)