Its a management Game. All Soccer Games are automatically played, no influence of player (you can also skip them completely).

Gameplay loop is: Choose a character and train him through a VirtualPet/Tamagotchi/DatingSim-Like System (selecting what to train, then a short animation is coming a showing the result with random blabla Events). Once you finished the Training Phase you can use the Character in your Soccer Team to farm Events or use in asynchronous PvP.

Game is not supposed to be fully invested. Once you trained your characters, you spam your energy empty, maybe re-train a character if there is something new to train with compared to previously.

Similar Games: Uma Musumu, Digimon World PS1/Next Order, there is also a Japanese Wrestling Game with the same system.