Welcome this is the 4th one out of an unknown amount the two missing songs that youtube did not find are happy ending by masamuchi sugi and Xmas in love by masamuchi sugi
If anyone is looking for lesser known city pop, look up Satoko Shimonari! She has an album called "Keep in Touch" that's filled with bops back to back!. "Game" and "Break" are my favorites!!
"Yu Yu Hakusho" if you refer to the very first, the second girl is indeed, Sailor Mars, from Sailor Moon, just as these fancy chaps have responded to you.