Kagaku na Yatsura
カガクなヤツら
A "scientific" perverted manga with a lot of tentacles. Komaba Haruki is a high school boy who has two eccentric girl friends: Hizuki Ayana and Kuze Airi. Ayana is half-dog and Airi is half-cyborg. Haruki gets involved in ecchi troubles caused by the two.
(Source: MAL news)