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An S+ rank ability user, the highest-ranked and most famous ability user in the country, possesses the rare 'Reverence' trait, which forces him to maintain an image of unwavering strength. Unable to find a suitable Guide, he has spent years enduring the strain of his abilities without proper Guiding.

Everything changes when he signs a three-month contract with the secretive owner of a powerful corporation, an A-rank Guide who has hidden his true identity for years. Their unusual arrangement revolves around a numbered system of increasingly intimate forms of contact, beginning with simple summons, hand-holding, and hugs.

What begins as a cold, exploitative contract gradually changes as the Guide discovers just how much the Esper has been suffering beneath his seemingly perfect exterior. Their transactional relationship becomes increasingly personal, blurring the boundary between obligation, affection, and genuine love.

Eventually, the Guide asks him to stop pretending and become his real boyfriend. Though initially overwhelmed, the Esper accepts, only to realize that becoming true lovers means confronting a level of emotional and physical intimacy neither of them can continue treating as part of a contract.