It is a story about Motoyasu died(not yet explained why in LN, but it is because he is killed by Bitch Goddess in WN.) and redo in paralel world with the same start. And yeah, it is like re zero, but there is only one checkpoint, and that is when the 4 got summoned. And, he can only remember some things, but he can't remember everything. If he force himself, the burden will destroy his body.