Adult PC Game: Animal Trail Girlish Square Final (Eng) by Whirlpool Archive

The protagonist, Nakamori Taiga, is an idol otaku working at a curry shop in Akiba.
His current obsession is an indie idol group active in Akiba, “Animal Trail ☆ Girlish Square”!
They’re still fresh on the scene, but one day their dedicated fans will take them all the way to Japan’s most famous arena, the Budokan…
In pursuit of this noble goal he spends his days with a select group of elite comrades (status ambiguously assigned) to fulfill their otaku endeavors.

Animal Trail Girlish Square Final (Eng) by Whirlpool Gameplay Preview