With the mistress "Riho," they carve out deep love. Riho, who works in sales at a fiber company, is secretly involved with a married executive from one of her clients. Amidst their busy days filled with work, they finally get to spend time alone together. They go shopping or to the aquarium, spending a day like any ordinary couple. As dusk falls, they intuitively kiss each other and head to the hotel… Without even taking a shower, the man licks every inch of Riho's body. When he caresses her heated private parts, she moans and writhes. The man inserts his hardened penis deep into Riho, kissing her repeatedly to fill their loneliness, and they reach climax together. They forget about their illicit relationship as 'mistress' and indulge in pleasure driven by instinct…
