3-byougo, Yajuu. Goukon de Sumi ni Ita Kare wa Nikushoku deshita
English title: 3 Seconds Later, He Turned Into a Beast
Japanese title: 3秒後、野獣。～合コンで隅にいた彼は肉食でした
Type: ONA
Episodes: 8
Source: Web manga
Genres: Hentai
Studios: Staple Entertainment
Producers: Studio Mausu, Suiseisha
Duration: 8 min per ep
Rating: Rx - Hentai

Tsumugi is a female college student who carries trauma from an aggressive man in her past. She meets Kaname at a mixer she requested specifically for unaggressive "herbivore"-type men. She and Kaname hit it off, and Kaname resembles Tsumugi's older brother a little bit, so she relaxes her guard around him. Kaname, however, feigns to be a "herbivore"-type man, but is in reality an aggressive "carnivore"-type man, and he can change his demeanor in an instant.

(Source: ANN)