Saenai Heroine no Sodatekata ♭: Koi to Junjou no Service-kai
English name: Saekano: How to Raise a Boring Girlfriend .flat - Fan Service of Love and Pure heart
Genres: Comedy, Romance, Ecchi
Type: Special, Episodes: 1
Aired: Apr 6, 2017
Studio: A-1 Pictures
Source: Light novel
Rating: PG-13 - Teens 13 or older
Synopsis:
Episode 0 of Saenai Heroine no Sodatekata ♭ which premiered on Amazon Prime. 

The team has come to the pool of a luxury hotel to do research for a swimsuit event for their game. As always, Utaha and Eriri are fighting, Michiru is doing her own thing, and of course Megumi is being aloof. Episode zero is here to bring you the swimsuit episode fans have been waiting for!

(Source: Amazon)