(To set the stage, Andrew married sissy after trying to divert her attention. The same events happened from when he married yumi, but Ulrich married yumi and odd married Aelita)
Andrew woke up and walked into the kitchen. He looked at his phone, "we need you" Aelita texted him. Andrew got dressed and went to walk out. Sissy didn't say anything, Andrew walked out of his house and drove all the way to the factory.
He saw Aelita, yumi, and Ulrich. "Where's odd?" Andrew asked. "I'm not sure he left to go do something" Aelita told him. Yumi and Ulrich had a certain look on their face. "Well while we wait for him you can debrief me of everything" Andrew told them.
It took them awhile but finally odd came back. "Where were you?" Andrew asked. "I was taking care of something important." Odd told him.
The crew did their usual thing with Lyoko.
Andrew walked in and saw sissy was gone. Andrew got a call from Aelita, "hey can you come over?" Aelita asked. Andrew went to her, "so sissy was by my home. Did you know?" Aelita asked him.
"No, I didn't" Andrew told her. "I'm going to confront odd" Aelita said. Andrew grabbed her arm. "Hey, can I tell you something?" Andrew asked. "Sure" Aelita said. "After I married sissy, I've not been happy in my life" Andrew told her.
"My life I've been, having thoughts about someone else" Andrew added.
Aelita was shocked and stopped, "who is it?" Aelita asked. "She's going to confront someone and have hell to pay" Andrew said hinting at her. Aelita stopped. "Odd has been kind of distant after awhile, something is going on" Aelita told him.
"Well, why don't we just hang around" andrew told her. Aelita turned around and andrew kissed her and they spent the day together. "I best be getting out of here before odd sees me" Andrew said.
Andrew went home, "why, you're late" sissy said waiting for him. "Getting a drink" Andrew said. "I know you were with Aelita" sissy said to him. "And I know you've been with odd, so you're the devil aswell" Andrew said throwing it back at her. Andrew removed the ring and put it on the table. "I'm done, and I'm leaving" Andrew told them.
Andrew walked out of the house while it was raining and walked to see Aelita. "Did you?" Andrew asked. "Yeah, i did" Aelita told him. "Aelita, you know I'm in love with you, right?" Andrew asked. "I know" Aelita told him. She held his hand and leaned her head on his shoulder.