Shin Megami Tensei: If...

Akemi Nakajima is a student in the "gifted class" in his high school. After being bullied and beaten by another student who a female student invoked, Nakajima uses his advanced computer skills to create the "Demon Summoning Program." He summons demons to attack the two, but he gets carried away and ultimately kills them. Now sick with the power of the demon realm Makai in his hands, he summons the demon lord Loki. Realizing summoning such a powerful demon was a mistake, Nakajima sets out to reverse the problem he has created by any means.

The terrifying manga based on the hit video game! Nobu is a troubled teenager with a dark past. His old high school was sucked into the Underworld, where he and his fellow students battled hordes of demons led by the Demon Lord, Hazama. However, Nobu and a demon-possessed girl named Yumi managed to claw their way back to the Surface World, hoping to start new lives at new schools. But it isn't long before Nobu uncovers a government conspiracy to raise Hell on Earth, and he and Yumi are once again forced to face their worst nightmares... (Source: TOKYOPOP)

While playing a ritual-like children's game called "Persona", students are knocked unconscious. While asleep, they encounter a man named Philemon who bestows several Personas upon them. When they wake up, the youths discover they can summon Personas. (Source: Kindan no Aku)

Shin Megami Tensei: if... Comic Anthology is a comic anthology based the game Shin Megami Tensei: if..., released on the same month of the PS1 port of the game.