Towa no Yuugure

Akira Himegami, orphaned at a young age, was taken in by his late father's best friend, Dr. Oumaki.

For years, Akira has harbored feelings for his housemate, Towasa Oumaki. Finally deciding to make a move, he invites Towasa on a date, determined to "upgrade" their relationship from family to lovers.

Their long-held love bears fruit, and they confirm their mutual feelings. However, tragedy strikes during the announcement of Towasa's visionary Android Development Project. A radical group raids the event, and Akira is shot, fading into unconsciousness.

When he finally awakens, he finds himself in a world 200 years in the future. What lies before his eyes is a sight beyond belief──.