Rito suddenly awakens after a dizzy spell in his house in a strange world and dungeon. Momo, one of those slightly-devilish-looking lasses appears and informs him that they’ve been sucked into a parallel world. And one of Rito’s main love interests, Lala—Momo’s elder sister—is trapped. Yes, we’ll go rescue her and others as knights in shining armor.
The "ultra-pleasant harem action" game has an action part in which the player helps the heroines defeat monsters in dungeons. Characters can be outfitted with different battle items to change attacks. The game also has a home part in which the player interacts with the heroines "captured" in the acton part. As shown in the video, players can "communicate" with the heroines by touching the screen and using the rear touch panel, thanks to the game's "To Love-Ru touch time" system.