For Makoto Hanaoka, life’s about to get more complicated. Saki Aoi, a lively girl with loads of confidence, confesses her love for Makoto one day. When he fails to reciprocate, Saki declares she will be his first love! She shares her goal with a mutual friend, Ryuji Taiga, who also confesses his crush on Makoto. Stuck in a love triangle, Makoto must find a way to make it work and have fun.
Makoto is surprised by Saki's confession of love and has to clarify that he is not the girl Saki thinks he is. However, Saki is undeterred and throws herself wholeheartedly into the mission of becoming Makoto's first love.
Now that it's summer break, Saki is saddened by the long separation, so Ryuji gives her a notebook he borrowed from Makoto. In high spirits, Saki goes to the Hanaoka residence with the notebook, but then...
Makoto decides to stop liking cute things so that his mother won't be sad. He starts going to school as a boy, and even asks Saki if she will go out with him...
Makoto and Saki have grown closer and Makoto has become friendly with students from their class as well, which makes Ryuji's heart uneasy. One day, on the way home from the aquarium with them, Ryuji notices something.
Saki and Ryuji attend a basketball game that Makoto is playing in. While watching, Ryuji asks Saki if she really loves Makoto. When she asks him the same question, Ryuji says...
The trio have stopped eating lunch together. Meanwhile the second-year students receive their career questionnaires. While each of them is agonizing, the school is preparing for the cultural festival.
Ryuji has suppressed his feelings and watched over Makoto as a friend. Makoto also hides having seen the student handbook and continues interacting with Ryuji. However, Ryuji notices something off about Makoto...
Saki rushes to the hospital because her grandmother collapsed. Her father also rushes back to Japan which means she can spend Christmas with him. Meanwhile Ryuji also proposes a promise for Christmas to Makoto.
On Christmas Saki happens to see a certain person get in a taxi. While she desperately chases after the taxi, Makoto is on the way to Ryuji's. Two people who weren't meant to meet still run into each other...
Saki devises a plan to help Makoto and Ryuji make up. While the two are working on that, Saki also has an unexpected encounter.
Makoto tells Saki and Ryuji of the he's set after the trip is over. In parallel, another person also gathers their courage and asks Makoto to "Please come with me for the free roaming time"...
Due to his father's work, Makoto goes to meet his grandfather for the first time.. While spending time with him, Makoto begins to sort through his own feelings. Then, with a hidden resolve in his heart, he decides to go home.
