Shin Megami Tensei if…

Something terrible has happened in the perfectly ordinary Karukozaka high
school. A resentful student named Hazama made contact with a different
universe that co-exists with modern-day Japan. As a result, a demon world
emerged within the city, its realms corresponding to the seven deadly sins of
the humans. With the help of fellow students, the protagonist must investigate
the matter and stop the insane plans of the student.

Shin Megami Tensei If… is a side story within the Megami Tensei universe
of role-playing games. Visuals and gameplay are largely based on Shin Megami
Tensei. The gameplay system contains typical Megami Tensei features such as
demon summoning, demon fusion, and the ability to talk to enemies before (or
instead of) fighting them. Enemies will react differently depending on the
player’s approach during conversation. The battles utilize a turn-based
engine. A stand-out feature of this installment is the presence of Guardian
Spirits: when the protagonist dies in combat, a supernatural entity will aid
him or her, affecting attribute advancement when leveling up.