A commemorative day established on this day by a company who deals with cosmetics because of the pun with the term "fair skin".
The pun:
Fair skin → shirohada → shi(ro)ha(da) → shi(4) ha(8)A few seconds after this, Youmu realized how much skin she was showingYou don't really get tanned in the netherworld...So I reckon I have a pretty fair skin.Half-Ghost, who always puts on blush since he's too whitelook
