I ran into the cover for the Hito to KOUMORI (人とコウモリ) single by KINMOKUSEI (キンモクセイ) with Yu-chan on it. I don’t know how I didn’t know about this before, because the single is over a decade old already. Nearly 15 years old, really.
Yes, it should -on principle- be upside down.
So I thought I would create a post to collect the ones I find at other times in the future. since it’s been ages since I updated Yu’s Wiki  and my 9th Fandom Anniversary is coming up. Can you believe it? I’ve been following Yu-chan for a third of my life xD That’s endearing… but almost sad. LOL
Anyway, the other single cover I could think of was Moumoon’s Sunshine Girl.