Eden no Umi

A new teacher from Tokyo called Nanjo is transferred to a rural all-girl high school. He is happy and kind, and with one exception, the students love him. The exception is not so friendly toward him. This girl and teacher are paired during a sport activity at school. There is a mishap. She faints and wets herself. He buys her new underwear, which everyone finds out about. They just do not know the story behind the purchase and the gift, as he is trying to protect her and save her from embarrassment. A minor scandal may be occurring.
(Source: filmaffinity)