A Game Between Two Families

Looking at the potion he just bought with the discount voucher for 40 gems, Hiro looked outside the floor-to-ceiling window while twirling the bottle in his hand.

A moment later, he uncapped the bottle and downed its contents in one gulp. Afterward, he promptly put on the cosmetics of a demon kin, reached into the system with his mind, and opened a portal leading to the Demon Realm.

Hiro slid a note declaring his absence from the provincial capital from under his study room's door and without hesitation, he entered the portal.

…

Boom!

A muffled explosion went off inside Hiro's body the moment he digested the potion.

[Notice: Spirituality and demonic energy are conflicting within your body. For your safety, the system has triggered a hidden feature.