Kaoru Tono heard a rumor: The laws of space and time mean nothing to the Urashima tunnel. If you find it, walk and you will find the desire of your heart on the other side... in exchange for years of your own life. One night, Kaoru finds himself standing in front of a tunnel that looks suspiciously like the one described in the rumor. He finds himself thinking about Karen, the sister he lost in an accident five years ago. To Kaoru's surprise, he has been followed by new transfer student Anzu Hanaki, who promises to help him experiment with the mysterious tunnel, but what does he want from Kaoru in return? And what will he have left to give, after the tunnel is over with him? (2023) — Sgt. Tiki
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