kazuma and shinji are childhood friends from ● school, and kazuma introduces his fiancée sarina to shinji. kazuma genuinely rejoices in his friend's happiness but witnesses sarina's sugar baby activities. intending to confront sarina for his friend's sake, kazuma is seduced by her silence. despite feeling guilty towards his friend, kazuma becomes infatuated with sarina's slender breasts and trains her into his personal fleshlight. their dangerous, sweet nectar intertwines intensely.