Watashi-tachi no Jidai!!

On the occasion of the Kishinjou incident, Kokoro headed to the aerial castle
(without a second thought) with an attempt to have Seija in her resistance.
But it turned out that the one with the title of strongest isn't well-suited to
her purpose (on the contrary, it prompted a battle). Kokoro and Medicine
fell to the ground in the middle. When the wicked hermit found the two,
she, taking advantage of the situation, taught them sexual things.

"An accomplished fact unites everyone."

Taking her suggestion without a doubt, they start strolling around
in order to find friends to make accomplished facts with.

[From DLsite English]