This is a Shin Megami Tensei parody world called Shin Moegami Tensei where all the demons of this world manifest into moe anthropomorphic girl versions of themselves. you befriend moe demons into fighting by your side by talking to them, then betray their trust by having a mad scientist painfully fuse their bodies together into a stronger moe girl. You can also explore demonic labyrinths and dungeons.

You see a moe Jack Frost girl in front of you she gives a smile and waves, What do you do?