Naoya, Saki, and Nagisa are planning a trip to enjoy the summer break. They start studying hard so that they will not take remedial classes during the summer break. Nagisa is not good at studying, but when Naoya tries to help her study, it does not go very well. Saki asks her best friend to become Nagisa's tutor, Shino, who has the highest grade in their year. Shino secretly has feelings for Naoya. She proposes when she finds out that the thr...

Shino is going to live in Naoya's house temporarily. She tells Naoya and Nagisa how she became friends with Saki. Shino transferred school during her first year of middle school and kept a line between herself and the people around her. However, she found herself becoming friends with Saki who reached out to her without regard to such things. Later, when Shino was shown to her room, she remembered the time when Naoya confessed his feelings to...

During summer break, Shino persuades Saki to kiss Naoya. Shino takes Saki to Naoya and urges her to kiss him right now. Once they get into a good mood, Saki is unable to continue, and she wants to do it at the fireworks festival. Naoya, Saki, Nagisa, Shino, and Mirika are going to go to the festival together. While enjoying the food stalls, they get separated. Naoya and Shino start looking for Saki and Nagisa. 在暑假的某一天，紫乃说服咲，要她和直也接吻。紫乃把咲带到直也身边...

Naoya, Saki, and Nagisa are separated at the fireworks festival. Naoya searches and finds Nagisa first. With the promise between Saki and Nagisa, whoever meets Naoya first will be able to spend time alone with him, they move to a park and watch the fireworks together. The two get into a good mood, but then Saki finally shows up, and Nagisa backs out as promised. Naoya and Saki also try to enjoy the fireworks, but Saki gets bothered by what Na...

The day after the fireworks festival, Saki Saki receives a set of camping tools and free camping coupons as a giveaway and is sent to Mukai's house. They arrive at the campsite and prepare for camping, with Naoya pitching the tent and Nagisa cooking. Meanwhile, Shino is still lecturing Saki about the two-timing. After a while, the four of them are at a loss for preparations due to their inexperience in camping. And then, Rika and her sister R...

Campsite in the middle of the night, Naoya is framed by Rika and falls asleep on an outdoor chair. When he wakes up, he finds himself handcuffed and abducted by Rika. She pesters him with all sorts of tricks to get her to talk to Naoya. In fact, she had brought him to this campsite to see the starry sky with Naoya on her birthday. Naoya continues to reject Rika, but he never breaks, and he promises to face her head-on on one condition. 深夜的露营地...

Rika is going to live in Mukai's house for the next five months, as promised at the campsite. She kisses Naoya on the cheek as a greeting and immediately makes Saki snap. She enters Naoya's room and declares that she will sleep with him. Naoya agrees to sleep with her. Since as long as it's not immoral, anything is okay. However, Saki, Nagisa, Rika, and Shino decide to take turns sleeping with Naoya. Who wins the game of rock-paper-scissors a...

After doing laundry, Mirika hangs up her bra at the Mukai house to show off. Naoya gets excited, and he says he wants to prove that he would be more excited if he saw Saki's and Nagisa's bra. Naoya succeeds in making the same heart rate after he sees Saki's and Nagisa's bra. At Saki's suggestion, they decide to go on a trip to Okinawa. They go shopping for swimsuits to wear, and Naoya chooses one for each of the girls. 理香在向井家洗了衣服，还故意把巨乳内衣晾在院子里给人看

The group leaves for a trip to Okinawa. Naoya gets scared on the shaky plane, but he hugs Saki and the other girls in a tight embrace, making them excited. After arriving at the villa of Shino's father, the five change into swimsuits and head out to the beach. In the midst of all this, Shino's feelings for Naoya are revealed to Rika and she is forced to cooperate with her. Nagisa wants to make Saki as happy as possible on this trip as a token...

During a trip to Okinawa, Mirika pretends to care for Naoya and ties him to the bed to confine him. She forces Naoya to kiss her, but she obeys the rule that kissing on the mouth is a lewd thing, and then she kisses him on the cheeks and neck. In the evening, they have a barbecue. Mirika wants to prevent Naoya and Saki from kissing, so she tries to make Naoya eat a dish full of garlic. Meanwhile, Shino was standing on a rocky beach. Seeing Mirika

On the desert island, Shino intentionally kisses Naoya, and in a panic, she tries to tell him why, but then she collapses. Naoya nursed her all night, but in the morning, her fever did not go down and she even suffered from heatstroke. Naoya decides to swim to get back to Saki and the others while carrying her. Naoya desperately swims to the beach on the main island, where Saki, who was also desperately looking for them! Saki cries with emotion.

Shino suddenly announces that she is transferring to a new school. She has a big fight with Saki, who is not convinced, but she still can't tell her about her feelings. Mirika gives Shino the support she needs by sending a message to Naoya to come. Once again, Shino confronts Naoya and Saki, and then tearfully confesses her feelings for Naoya. What will be Naoya's answer? And what will happen with Naoya's relationship with Saki, Nagisa, Mirika,..