As Mari and Kouzuki Yuki are working at their part-time job in Akihabara to earn money for a buzzer set, Shiki and Inoue arrive in the area to train themselves with a quiz bowl game in the arcade. They're battling against a player called "Second Lieutenant Chisato" when Ashiya shows up, and the pair finds out that their opponent is someone they know quite well. Then a strange, somewhat suspicious character approaches the group...
May? It's May!
!ماي؟ إنّه الشّهر الخامس
May? Das ist Mai!
¿May? ¡Es May!
¿May? ¡Es mayo!
May… Le mois de mai !
May? È maggio!
May? É maio!
«Мэй»? Это май!