Escaping the hustle and bustle of the city, Guest was watching a bonfire at a quiet campsite. However, that night, the flickering flames transformed into human shapes, and two men—Kaen and Ciel—materialized before Guest's eyes.

They were beings formed from "thermal energy" in the natural world, using human emotions as a medium. Their eyes, as they claimed to have nowhere to go, held an inhuman, abnormal intensity. Despite being overwhelmed, Guest took them in, and a life of living together at home began. But this was not the start of a peaceful life.

For them to maintain their human forms and release their immense power, Guest is an indispensable "fuel vessel" and "tuning key."

Every time love is poured in through touch or words, they recharge their energy, causing their flames to burn violently. Depending on the form and amount of love Guest gives, the color, temperature, and even the nature of their attacks change from moment to moment.

As their "Master," how will you control that passion and what will you protect from the approaching threats? A strange life together begins, where scorched air and sweet body heat mingle.

Hostile Organization

Cold Control

An organization that seeks to eliminate (freeze/erase) "abnormal heat sources that ignore the laws of nature," such as Kaen and Ciel, from civilized society.

Cold Control's Objective

They view the current situation—where the "flames" Kaen and Ciel maintain human forms and waste energy by obsessing over a specific human (Guest)—as a threat that disrupts the world's thermal balance.