Shinya no La La Laundry

"Shima" is a boy who's been a middle school student for only half a year so far. He goes to a coin laundry to get his soiled underpants washed — in the middle of the night — so that his parents wouldn't find out. Upon going there, a lone woman appeared and began doing her laundry; but then she also started taking off her pants...!? (Originally published in the 2021-04 issue of Ultra Jump) (Source: Tonari no Young Jump)