Since Maru is no longer a single cat, he spends a lot of time with his new girlfriend Hana. As a real professional in various fields of cat games, he obviously has to teach her a few things, and he looks forward to doing it very much.
He even patiently demonstrates jumping into big boxes in this video. The first time it doesn't work and the box falls over, but the second and third time. Maru is really a great teacher!