Haunting Rule Horror, Starting with Crayon Shin-chan

[Rules-Based Horror + System + Comedy + No Female Lead] One day, Lin Fan is lounging on the sofa, watching Crayon Shin-chan as usual, when a mysterious vortex suddenly appears and transports him into the world of Crayon Shin-chan. But the world is just a tiny bit different from the one he knows. While happily enjoying himself, he is struck in the face by a sheet of paper. He looks at the paper in his hand: [Crayon Shin-chan Strange Dungeon Rules: 1. At home, keep the original story on track, and the Nohara family won't hurt you. 2. You must attend Futaba Kindergarten. 3. Action Kamen is Shin-chan's favorite show. Be sure to watch it on time. 4. Nene likes to play super-realistic house. If she invites you, don't turn her down. 5. If there's a problem at kindergarten you can't solve, try asking Bo. 6. Don't let Masao catch you alone with Ai. 7. Remember, there is no one named Kazama Toru at Futaba Kindergarten. Don't mention his name.] What kind of story will unfold for him?