End-of-Manga spoilers ahead so read at your own risk, I’ve avoided DSoD spoilers tho so don’t worry about that
(Atem gets his own body back AU)
1 AM- Atem is staying the night at Kaiba’s. They are playing card games in bed. This can only end well.
2 AM- Kaiba’s third Blue Eyes is GONE. EVERYBODY PANIC
3 AM- Blue Eyes is not gone, just under a pillow. Kaiba has kicked over both decks.
4 AM- Sorting cards. Neither of them remember who had the foiley Polymerization.
5 AM- Putting cards in card sleeves. Kaiba is putting his deck in Obelisk the Tormentor sleeves. Atem is putting his in Toon Dark Magician Girl sleeves. Kaiba is silently judging him.
6 AM- Sun is up, time to sleep.
7 AM- Kaiba’s alarm goes off. They sleep through it.
8 AM- Time for Kaiba’s first meeting of the day. He sleeps through it.
9 AM- Time for Kaiba’s second meeting of the day. They are still sleeping. Mokuba says a prayer to Ra that they are both wearing pants and goes to wake his brother up. His prayers are answered.
10 AM- Kaiba is out the door in less than three minutes. Atem rolls over and goes back to sleep.
11 AM- Atem is awake. Everybody he knows is at school or at work. Atem is bored.
12 PM- Atem discovers that Kaiba’s laptop lets him buy things. He buys Blue Eyes Toon Dragon card sleeves as a prank.
1 PM- Atem buys Blue Eyes Toon Dragon bedsheets. Atem discovers one day shipping.
2 PM- Atem buys Blue Eyes White Dragon card sleeves and bedsheets as a preemptive apology.
3 PM- Kaiba gets an alert during a meeting that one of his credit cards has been maxed out. He asks his secretary to freeze it. Atem discovers the laptop is no longer letting him buy things. Atem is bored again.
4 PM- By going through Mokuba’s bookmarks, Atem discovers that there are four animal shelters within ten kilometers that kill cats if they are not adopted within three days. Atem is no longer bored. Atem has a Mission. Kaiba is stuck in a meeting and wishing for death.
5 PM- Yugi is out of class but refusing to help Atem. Atem goes to Jounouchi instead. Jounouchi agrees to help.
6 PM- Kaiba finally takes his lunch break and calls Atem. Atem does not answer. Kaiba considers calling Yugi but decides against it. He will come to regret this decision.
7 PM- Somewhere along the line, Honda joined the mission. Anzu is not answering her cell. Atem is sure this is Yugi’s fault.
8 PM- Kaiba is in his last meeting of the day. This meeting is very important. He tells himself this will be over soon.
9 PM- The meeting is not over. It is still very important. Kaiba is playing Pokemon under the table to avoid relapsing into Season 0 insanity. Nobody notices.
10 PM- Kaiba finally comes home. There is Blue Eyes merchandise everywhere. There are cats everywhere. There are probably cards everywhere, knowing Atem. There is also probably cat pee everywhere. Kaiba is hoping the two don’t overlap. Atem is not everywhere. Atem is nowhere. Kaiba screams his name anyway.
11 PM- Atem was not gone, just laying under a pile of cats. Kaiba politely informs him the cats have to go. Atem politely informs Kaiba that cats are sacred beasts and are going nowhere. Kaiba can’t win. Kaiba never wins.
12 AM- Kaiba wants to sleep. Atem wants to play Duel Monsters. They play Duel Monsters.