KanColle: See You Again on Another Quiet Blue Sea

Nagomu Irino returns to his Kyoto home for the first time in ten years when his father is hospitalized. Nagomu is eager to take over Ryokushou, the family's Japanese sweet shop, but he's instead asked to be a father figure to Itsuka Yukihira, the girl everyone calls the successor.

Humans that have been physically altered and turned into dangerous weapons are known as the Extended. Juuzou Inui awakens as one of these weapons — with amnesia. But his job as an agent investigating the Extended leads to a mysterious child with Extended ties showing up at his office. Now Inui must keep the child away from street gangs and the megacorporation Berühren, and it won't be easy.

Makoto, Adi, and Chloe attend a special training school where they train to become the heroes of the next generation. Unfortunately for them they are actually science experiments for Hydra. When Adi and Chloe get captured by Hydra for learning the truth, Makoto seeks out the one group he believes could help them- The Avengers. After rescuing the kids The Avengers decide to take them in and train them to be the heroes of the future.

Yuugo Hachiken enrolled in Ooezo Agricultural High School for the reason that he could live in a dorm there. In some ways he chose Ooezo in an effort to escape the highly competitive prep schools he had attended previously, but he was faced with an entirely new set of difficulties at Oezo, surrounded by animals and Mother Nature. After growing up in an average family, he began to encounter clubs and training the likes of which he had never seen before.

In the world only the aristocrats have the power to fight the monster - mana. Even though Melida Angel was born in an aristocracy and studies at an academy developing mana users, she has no mana. To find her talent for mana, Kufa Vampir was sent to be her tutor but at the same time, he was ordered to assassinate her if she has no talent for mana. He makes a cruel decision to assassinate her because he thinks that it is a wasted effort that people who have not any mana are working hard in this world... However, he asks her, "Do you want to try to entrust your life to me?" He is not as an assassin nor a tutor. He is someone betting on his pride as an assassin tutor, to show the world what Melida is capable of!

Real estate agents Reiko Kujirai and Hajime Kudo work in the nostalgic Kowloon Walled City. As they spend more time together, Reiko’s feelings for Hajime grow. But when she finds a photo of him and his former fiancée, she’s shocked to see the woman looks exactly like her. Reiko then realizes a chilling truth: she has no memory of her past.