This manga is a collection of short stories:

Ch 1: Cat-Neesan's Counterattack
Ch 2: Gentle Bespectacled Devil
Ch 3: Immorality's not Scary at All
Ch 4: Love, Love, Really Love
Ch 5: Endearing Body
Ch 6: Sympathy for the Devil
Ch 7: Sweet Kiss
Ch 8: Lapis Lazuli
Ch.9: The Bag's Contents