This is a rerun of the Laundry Reloaded STS from January 2020.
The event duration will be 11 days.
The original cost or boxes has been lowered so all players can have better chance to complete the event and get all the rewards.
However, the event currency packs from the previous event are not part of the rereun.
Thanks @simmerdownMAL for making the event guide and sharing it with us
Tap on the image to enlarge: