Ch. 1-4: Pheremone Syndrome: a hypersecretion of pheremones that induces arousal
Ch. 1,4,8: Diagnosed Hinoki gets aroused by diagnosed bento seller Sugino and is taken
Ch. 2: Diagnosed playboy Tatsumi makes the mistake of letting gloomy otaku Inui touch him
Ch. 3: Researchers Mura and Yakushi are studying the syndrome
Ch. 5: After his neighbor Moriyama's wife leaves him, Mizukawa helps train him to stop being useless
Ch. 6-7: Masumi deals with his perverted, obsessed lover and CHF Fujio
Drugless Sex