Days with My Stepsister, Vol. 3 (manga) [Paperback]

Its Yuuta and Sakis first summer break as stepsiblings. Now that Saki has gotten a job at the bookstore where Yuuta works, theyve ended up spending more time together, but she seems really stressed. When she even turns down an invitation to go to the pool with everyone, Yuuta decides to figure out whats going on and help her relax. In the process, he finds himself thinking of her in ways that a brother shouldnt&