Miyabi, a beautiful mother, lives with her son, Satoshi. - She is happy every day, but she has been lonely because she has not been able to see her husband for a long time due to an overseas assignment. One day, when my son's best friend, Yuu, who is an old friend, visited the house for stargazing, he suddenly received a confession and a kiss from Yuu. Miyabi felt a thrill in her chest that did not stop despite her own will. After that, Miyabi, who was pressed by Yuu and accepted the kiss again, fell into the pleasure ...