I Have a Kindergarten Under the Sea

The Story

Serena wakes up as an F-class princess of the Shell Clan, having been betrayed by her sister Lilith and former fiancés. Abandoned on a sunken ship, she unlocks the Kindergarten System. She begins caring for Eldrin, who is now a child, along with the other sea lords. As she tends to them, she slowly wins their hearts. Her efforts ultimately lead to saving the ocean itself, and she becomes its queen.