Laidbackers (2019) on Netflix

Plot summary

Kumi Honamanuma is an art student who has come to Kyoto to take charge of the dagashi store her grandmother used to run. She expects the place to be empty, but Harami Mino, K Kusanagi, Mai Haisaka and a dog are living in it, and she ends up sharing the store with them. The girls say they were heroes reincarnated into the present day to chase the demon king, though they have no missions left to carry out and their days pass quietly. Then Ran, the demon king in a past life, arrives; her reincarnation failed and left her in the body of an elementary school girl, and she asks them to collect the demon king's fragments.