The official website for previously announced upcoming Tenka Touitsu Koi no Ran: Shutsujin! Sanka Yoninshuu short ONA has revealed two additional cast members, who are the popular characters from the original app game. The ONA will be streaming within the app in May 2018.
Yukimura Sanada: Toshiki Masuda (the Touken Ranbu: Hanamaru series)
Saizou Kirigakure: Takashi Kondou (the Dance with Devils series)
Source: Famitsu App for Girls
Modified by Sakana-san, Mar 31, 7:31 AM
Officially starts May 28, according to report of completion screening event. IN song, theme song, and package that includes all eps. releasing on end of August. The unit that will be performing theme song is named Quartet (四銃奏).