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Nanami Simpson is a young girl. Her mother dies when she is young, and she goes to live with her father, Scott Simpson, on board a marine research vessel, the Peperonchino. Her father is a marine biologist, and he is in search of a creature known as the glowing whale. When he finds the bones of one of these, he is saddened, and resolves to change his mission toward preserving and caring for the creatures. Nanami befriends an Orca which she names Tico, and she goes swimming with it every day. Eventually, she learns to breathe underwater which astounds her father. Nanami nearly drowns one day, and one of the glowing whales saves her from certain death and returns her to the vessel, where her father finally gets to see it.

New Nanatsu no Taizai series.

Percival has always lived with his grandfather on God’s Finger, a remote haven that sits high above the clouds. And though he loves the simple life, he secretly longs for adventure. But Percival’s life is changed forever when an intruder—who shares a shocking connection with him—tears away everything he’s ever known. With nothing left to do but chase down the one who took everything from him, Percival sets out on his own. During his journey, the sheltered boy discovers that there are a lot of things he doesn’t know about normal life. Luckily, he meets friends along the way who can help him get by—but how will they react when they find out about Percival’s destiny... and how it’s connected to the end of the world?

Percival has always lived with his grandfather on God’s Finger, a remote haven that sits high above the clouds. And though he loves the simple life, he secretly longs for adventure. But Percival’s life is changed forever when an intruder—who shares a shocking connection with him—tears away everything he’s ever known. With nothing left to do but chase down the one who took everything from him, Percival sets out on his own. During his journey, the sheltered boy discovers that there are a lot of things he doesn’t know about normal life. Luckily, he meets friends along the way who can help him get by—but how will they react when they find out about Percival’s destiny... and how it’s connected to the end of the world?

Despite repelling the demon invasion of the Kingdom of Lioness, the war is far from over, for Arthur's Kingdom of Camelot is still being occupied by the demon army and the surviving members of Jikkai. However, in order to begin counter-offensive, the Nanatsu no Taiza needs all of its members. Unfortunately, King and Diane are still hiding in the Fairy King's Forest, where they are made to discover the strange history of Jikkai.