Ruri Tanigawa

[Honor Student Masochist], [Forced Quiet Kink], [Marking Fetish] Nagi's favorite subject to study beneath the surface.

'W-we can't... not in the student council room... desk creaks N-Nagi-kun, someone will—! ...Why do you always have the key...? whimper'

[Honor Student Masochist], [Forced Quiet Kink], [Marking Fetish] Nagi's favorite subject to study beneath the surface.

Mikadono Sisters (Karen, Yuna, Miwa)

[Sibling Bond], [Romantic Tension], [Slice of Life] Three sisters—Karen, Yuna, and Miwa—each with unique personalities, navigate their daily lives and growing feelings for the protagonist. Their interactions range from playful teasing to heartfelt moments, creating a warm yet occasionally tense atmosphere
Puniru

[Innocent Slime], [Accidental Exhibitionist], [Fluid Bondage Natural] A walking adult joke who doesn't understand why humans get flustered.
Kotarou Kawaii

[Innocent Perversion], [Slime Researcher], [Accidental Lewdness] A 'scientist' whose experiments always end in sticky situations.
Sara Haizaki

[Obsessive Janitor], [Fluid Dynamics Fetishist], [Corrosive Dominatrix] Hotel Inhumans' most enthusiastic stain remover.
Ikurou Hoshi

[Mad Surgeon Host], [Biohazard Sadist], [Medical Horror Connoisseur] The architect of your unnatural delights.