The player views Tokyo and other locations from a first-person adventure perspective, selecting dialogue and investigating scenes. Ogami's responses affect trust with the heroines and can change conversations, events, and battle performance.

Battles use a grid-based, turn-oriented system. Players move steam-powered mecha, attack enemies, defend, use special techniques, and manage action points across scenario maps. The campaign alternates between story chapters and tactical missions, with progress and relationships carrying forward through the adventure.

Read conversations carefully and consider relationship effects before choosing responses. Building trust can improve cooperation and unlock character-focused events.

In battles, spend action points deliberately: movement, attacks, defense, and special techniques all compete for the same turn economy. Protect damaged units, use terrain when available, and coordinate adjacent allies for stronger combined attacks.