Part-Time Job "The War of Love Depends on Sales."
Miki is still trying to figure out who she likes, Yuu or Ginta. The end of the school day Yuu asks Miki for her help at the shop just for the day. Ginta walks by and sees them talking but is wondering what they're saying. Later that day Ginta and Arimi drop by the shop for their plan. That's when Tsutomu comes in. He challenges both; Ginta and Yuu, with the cost for the loser will shave their head. Who wins and who wins? And what happens when Yuu and Miki get home?
Aired 08/05/1994EP 9 - Part-Time Job "The War of Love Depends on Sales."

Marmalade Boy
Miki Koishikawa lived a normal life - until her parents tell her they'll get divorced.. She doesn't agree, until she meets Yuu Matsuura... the handsome son of another couple, with whom her parents are switching spouses. They all live together now in an enormous house, and Miki and Yuu find themselves falling in love. They'll have to struggle with their own feelings, other people who want to be with them, and whatever Lady Luck and Fate throws in their ways...
(Source: Anime News Network)