[Novel/Novel]
The main character, Kento Kakimoto, is an ordinary first-year university student, and today he receives a lottery ticket for a shopping district from his mother and is doing a lottery.
Then, they won the first prize, a pair of hot spring travel tickets.
Kento was planning to ask his parents to go with him, but his mother tells him to use it himself.
The person he chooses is his sister-in-law, Saka, who is currently a shut-in and refuses to go to school.
Naturally, Saka refuses to travel, but at Kento’s desperate request, she agrees to go.
On the day of the trip, Kento is relieved that Saka shows up properly. When they arrived at the inn, Saika had fallen asleep while Kento was taking a bath in the hot springs.
Kento also falls asleep for the time being, but in the morning, Saka is sleeping on the same futon as Kento.
Then, Saka says, “I don’t want her to be my younger sister,” and confesses that she “loves my older brother.”
She begs him to become lovers even just for the duration of this trip. In exchange, I also added the condition that I would go to school starting tomorrow.
The wise man had no choice but to accept that. Because Kento also liked Saka.
Afterwards, the two bond in the hot spring bath inside. After making love in the room until the end of the day, they headed home.
When they stopped at a convenience store on the way home, Kento thought that Saka was sleeping and confessed that he loved her too.
When Kento realizes that he is awake, he panics and runs away to a convenience store, but when Saka tries to follow him, he meets a girl.
That girl was the one who made Saka refuse to go to school.
However, later on, Kento spots the girl in front of the house and calls out to her.
Kento, who received the letter from the child, hands it to Saka. When Saka looked inside in fear, she saw an apology.
After that, Saka starts going to school. At the same time, his activities at night became more active, and he began to seek out Kento every day…