Natsu e no Tunnel, Sayonara no Deguchi
The Tunnel to Summer, the Exit of Goodbyes·夏へのトンネル、さよならの出口
A student named Kaoru Touno encounters a tunnel rumored to defy time and space, offering one's deepest wish in exchange for lost years. On the night he discovers a tunnel matching the description, he recalls his sister, who died in an accident five years earlier. He is joined by Anzu Hanashiro, a new student who claims to assist in testing the tunnel's properties. However, Kaoru wonders what Anzu seeks in return and what personal cost he might face after using the tunnel.
