Oku-chan

Oku-chan is a terrestrial octopus which was brought from Nana's D-Dial in order to grow her breasts. It is a Kyuu Octopus of the planet Hacchi. It looks a red-coloured gigantic octopus whose white-coloured horns are at its head. It sucks the breasts of girls with its suckers for growing their breasts. It debuts in the chapter 156 of To love Ru and the episode 8 of Motto To Love Ru. Nana calls it in order to know how to use it for increasing her breasts and it begins to suck the breasts of Haruna, Oshizu and Nana with its suckers.