A short animation released with the limited edition of the LIPxLIP album "Umarete Kita Koto ni Kansha Shi Nasai!"

Rami Nana-Hikari's adventures continue as the keeper of the Secret Treasure. A year has passed since the apocalyptic disaster which left a great crater in the center of Edo City. The destruction wrought major economic consequences and while much investment was poured into the public works for the new Edo Castle, the citizens were all feeling the pinch of the recession.

The famous cheerful guy, Saikawa had tried to rip off the gloomy kid, Sayama's mask. After that day, he had captured Saikawa's attention and Saikawa had volunteered to teach him for the upcoming examination but with one condition, Saikawa can do whatever he wants with what is hiding under Sayama's mask. He hates it when people touch his bare face, lips and inside his mouth, but he cannot say anything when Saikawa touches them. With the combination between Saikawa's harassment and the awkward mask boy's behavior, this manga will be packed with sexual tension between these two.

The OVA of set to premiere in theaters in 2023.