Hentai Ouji to Warawanai Neko. – 12 (END)

「変態王子と記憶の外」 (Hentai Ouji to Kioku no Soto)
“The Pervert Prince and Outside the Memories”

There was one piece of the puzzle required to make the plot make sense, and we finally got it. The self-sacrificing hero and his memories…I would expect no less from our Ouji, hentai or not.