Caffeine Summary

My brother has sex with my girlfriend…? Even in front of me? ‘Jung-Min’ witnesses sex between her girlfriend ‘Da-Yeon’ and her older brother ‘Chan-Woo’ by chance and feels excitement for an unknown reason along with anger at having her lover stolen. It’s a strange yet thrilling feeling that I’ve felt for the first time. It wasn’t just Jung-min who felt the addictive pleasure…