I shall never return

Yori and his twin sister Iku used to be very close as children but lately Yori has grown colder toward Iku and is always eager to stay away from her. Iku was confused by Yori's attitude. Actually Yori is in love with Iku and that forbidden love is causing Yori sleepless nights since Yori and Iku are sharing the same room with bunk beds. Yori tried to ease his intense desire for Iku by bedding Iku's best friend. He had even applied to attend a boarding school in another city to take him far away from Iku. Yori lost his resolve to stay quiet about his feelings when Iku started to talk about having a boyfriend and going on dates. Now Yori want to have his little sister and he confessed. Iku loves her big brother and wanted them to stay together, so Iku is willing to anything to keep them together. But Yori wanted to have Iku as a lover, not as a sister loyal to her twin.

With the arrival of summer and the school break, Chizuru, Kota, and the rest of their friends are lazily enjoying the warm weather. Chizuru flirts with Kota, Kota gets embarrassed, and Nozomu gets in the way. Tayura pines after Akane, Akane rebuffs Tayura, and a sexy good time ensues. The status quo isn't quite the same since the fox snared her prey, but the timeless boy-meets-girl tale lingers on.

Ranmaru and Kei have a strong and passionate relationship built on years of trust, sacrifice and love. But when the mysterious son of a Yakuza boss begins to pursue Ranmaru's affection, tempers flare, and hidden emotions rise to the surface. Will Ranmaru and Kei's love survive, or will the emotional conflict finally come to a head?

One rainy day, salaryman Amakusa Ryou is saved by a high school girl he doesn't know at the station. He later finds out that the girl is Arima Ichika. Ryou is somewhat of a womanizer and to repay her for saving him, he suggests giving her a kiss or going out on a date with her, in which Ichika tells him he's creepy. This, however, opens a new door for Ryou and he falls madly in love with her. Ever since then, Ryou tries to overly express his feelings to Ichika. Ichika just keeps insulting him and says he's being creepy, but he just seems to take it as her way of showing affection towards him... Note: The show streamed in advance on Amazon Prime Video on March 29, 2021. Regular broadcast started on April 5, 2021.