Every time, the security guard gently carries them back outside, to a chorus of meowed protests.

What’s so adorable is that this has been their morning routine for years.

Five years later, Ken-chan and Go-chan still haven’t given up.

Cat Trying to Enter Museum Stopped by Security Guard

At other times, they will simply sit outside the entrance, sunning themselves and napping.

The loyal black cat now wears a collar as the museum’s kitty mascot.

The museum even sells cat calendars and card games with illustrations based on him and his friends.

1!####catpic.twitter.com/zvBnS0FIqr

(@bijutsu1)April 22, 2022

!Hey Ken-chan!