A muscle-bound ghost in my hallway...!? No...Have I been possessed by a ghost!? Our protagonist, Mai Mizusawa, moved from the countryside to the big city to work as a chemist while living alone. Though she was extremely busy, she still managed to live a fulfilling live, until one day after coming home, she finds a completely naked (but extremely muscular) man in her house...! "I'm so sorry! For some reason, I can't leave your house!" He told me, - He's probably a ghost. - He has no idea what happened to him. - He has no idea how to pass on to the next life. Though she's completely confused by all the inconceivable things happening to her, she's still spent by his idiotic behavior. "Why the hell does a ghost have to be so ridiculous beefy...!?" Whatever, I can't do anything about it right now so I'll just leave it. That night, she experienced sleep paralysis, completely robbing her of her ability to move, all while being unable to resist the ghost's caress...