Gintama' - episode 27 - 02 Oct, 2011

Overall episode number: 228 Shinpachi introduces his new girlfriend to Otae...but she turns out to be Momo-san, a character from the popular Love Choris game. There are more and more boys in Edo who can no longer distinguish game from reality like Shinpachi. Otae asks Gintoki to bring Shinpachi back to the real world. The only way is by entering the world of Love Choris and talking some sense into him. Gintoki ends up choosing a very unique heroine to be his girlfriend... (Source: Crunchyroll)