Ian is living happily with her engagement decided and the wedding coming up in a month. One day, she suddenly gets a call from her ex-boyfriend, who asks her to meet him again. She was dating him with the intention of getting married, but he rejected her and didn't marry her. Since then, he has remained in Ian's history as the man she hated the most in her life. Although she has Kokoro to refuse, she believes him when he says that it's the last time and goes on a two-day, one-night trip to a hot spring - the two of them meet for the first time in a long time and get hot, repeatedly cumming inside each other.