The middle-aged man's nipples were played with until he made strange noises, then he was licked and kissed to seal his mouth! (Satsuki Ena, Tsukino Kasumi, MIAA-630)

A close female friend engages in compensated dating after school, accepting the advances of an older man. He continuously fondles her sensitive nipples, producing strange sounds, and then kisses her intensely, sealing her mouth with his own, until she finally explodes!