Ayumu is a high school student who has recently started using the services of a “sugar sister”. Hinano, his “sister”, cooks for him, plays video games with him and even watches a scary horror film with the student. It has been a long time since he had such a nice day. However, Hinano finally reminds him of the “favour” he has to do for her in return: she wants him to play with her big, plump breasts! Tokiko Kurahashi missed her school trip in the past … She now decides to take to her heels and travel to a hot spring. However, things don’t always seem to go the way you want them to. Fortunately for her, Takanori Doi offers to take her along with him. Though, shortly after arriving, the next problem arises: Tokiko has forgotten to book a room! Friendly as Takanori is, he lets Tokiko sleep in his room … That is, if they even plan on going to sleep that night! Source: aniSearch.com