Aoharu x Machinegun

Aoharu x Machinegun (Japanese: 青春×機関銃 Hepburn: Aoharu x Kikanjū) is a Japanese manga series by NAOE, serialized in Square Enix's shōnen manga magazine Monthly GFantasy since January 2013 and collected in seven tankōbon volumes. An anime television series adaptation has been announced and is scheduled to begin airing on July 2, 2015.

When Hotaru moves into a new apartment alone, there’s a mysterious man standing nearby the apartment. Hotaru decides to confront the man, who turns out to live in the neighbouring apartment. The next day at school, Hotaru’s best friend Kanae tells Hotaru that a host tricked her out of her money. When Hotaru goes to confront the host, he happens to be none other than Hotaru’s neighbour, Masamune?!