Nanami knew the second her love bird friends, Megu and Sousuke, invited her to the beach, she was gonna be a third wheel. But at least she thought she could get some at the beach. Surprise, it’s a private beach and she’s ditched to look after Sousuke’s younger brother, Yuusuke! Bummed out at first, she notices that Yuusuke is kind of cute and she’s not going to put her new sexy swimsuit to waste. If her friends can go and have fun, then she deserves her own beach side romance!