Part of a series of games focusing on protagonist Youhei Nase and his relationship with different heroines in each volume.
In the final installment, we meet Yaeka Nase, Youhei’s homeroom teacher (and incidentally his older sister) as well as classmate Maika Ootori. Yaeka is very popular amongst the students as a respected teacher despite being kind of a drunken slob at home. Maika is an exchange student and lover of all things Akiba and often drags Youhei with her to Akihabara. One day, Youhei finds out that Maika is going to be sent back to her home country and it’s up to Youhei and Yaeka to help her stay in Japan.