The main male protagonist who is 19 years-old at the start of the series. Before the start of the series he got dumped by his girlfriend Kyouko, with whom he had plan to come to the famous Koibana Onsen Inn popular with couples. However not wanting to cancel his reservation, he comes alone nonetheless. There on his visit he ends up falling for Nonoka, the second oldest of the three daughters operating the inn. From then on he start working at the Koibana Onsen part-time.