Three months into his first job, everything is going well and he even has a new girlfriend. Then Miru, the senior employee assigned to train him, suddenly gives him a blowjob and asks, "This feels better than your girlfriend's mouth, doesn't it?" Apparently jealous of the new relationship, she uses irresistible sucking technique to claim him. Unable to bluntly reject a workplace senior, he gives in—and from that day forward, his new career becomes a cycle of ejaculating, getting cleaned with her mouth, and being sucked hard again.