Touma started his career at the Saint Laird company fresh out of school. There he met the beautiful and caring senpai Mai, who is quick to get jobs done. However, he soon found out that she is actually quite the slacker away from work. Although she warned him to keep it a secret, their relationship soon became one where they would talk about anything.
One day, Mai came over to his room to drink with him, and ended up in just her underwear in a drunken state. Tempted by her words and actions, he ended up having sex with her. The next morning, she bashfully dismissed the events of the previous night and left without saying another word.
Starting from that day, Touma’s life began to change rapidly. His relationship with his stylish boss Shinobu deepened as their workload together increased. When everything was completed, he was assaulted by her and they had intense sex together. Meanwhile, he had caught the attention of a high schooler Mikoto who works at a family-run lunch shop which he favours. What will become of his relationships with these attractive women?