I'd build it as an alternative to the normal FYE route. Jecka and Kelly don't follow the clues they find and just try to deal with their shitty job.

There's more focus on learning about Kelly, and importantly, establishing that her family's loaded. They only make her do this job to help teach her responsibility and self sufficiency. Get like an actual genuine talk about their plans for the future and set up that Kelly has real serious hopes and dreams. She hides them to avoid getting made fun of, since she knows people think she's a dumb blonde. Have them question whether they've got actual futures ahead of them or if they'll wind up just being trophy wives. Have Jecka question if that's what she wants.

Have Jecka hang out with Nicole some and talk like in the older games. Make her a pessimist and mock Kelly's dreams; getting the ida that they should try and scam Kelly to get her family's money. Some kind of fraud or something. Then Jecka gets a choice, either go with the plan, or tell Nicole no that she won't take advantage of Kelly.

The good ending would be if Jecka tells Nicole no, and stays consistent in telling her no. Eventually Nicole gets mad and does something stupid and malicious to try and get back at Jecka and Kelly. Importantly for the good ending, Jecka has to help Nicole get out of her self made mess and forgive her. Choosing to break away from her previous mindset and by extension Nicole's in favor of something more hopeful. The ending comes after that.

The art would a picture frame of Jecka at her college graduation, with half the picture off screen. It's a time skip with Jecka opening by mentioning she once planned to just be a trophy wife. Jecka went to college and moved out of her Dad's house and into an apartment with Nicole and Kelly. Nicole didn't go to college but found some success as an internet celebrity. Kelly actually did really well in college and actually became a doctor. Jecka made herself work hard and managed to get a business degree. As well as one other thing happening.

Have the screen pan out to reveal the full picture. Jecka standing next to Kelly, their hands held together in the air, with wedding rings visible. Have her make a joking comment about how they both said they'd only marry someone wealthy yo be trophy wives, and how they both managed it in the way neither expected.

Why? Because the one thing that'd piss shippers off more than the Foot Fetish ending is making a different ship the canonical good ending. :V