Each day, I recorded three things:

This paper synthesizes those 90 observations into thematic phases: Weeks 1–2 (Friction), Week 3 (Negotiation), and Week 4 (Reconciliation).

It happens over the thermostat. She wants 72 degrees. I want 68. The negotiation lasts 45 minutes and involves bringing in outside opinions via text message (Mom sides with her, Dad sides with me—shocking nobody).

She wins. I buy a space heater for my own bedroom. The cold war (pun absolutely intended) begins.

We still annoy each other. We still have different tastes in almost everything. We still argue about stupid things. But after 30 days, I know something I didn’t know before: I would do this again. In a heartbeat.