Wait a minute. There's a leap second? Like this is actual thing that exist? How come I didn't know about this! Like why is no one talking about this. How did I spend my whole life not knowing this. God, is there a leap minute as well. Does that exist
And kudos to Team Duwang for spotting the forshadowing, especially at ch 517. How on earth did you guys know that the arms are in the shape of a clock? I definitely wouldn't even be able to notice that even if I read through the manga again.
Edit: Now that I think about. This is actually quite a gamble since Baku have no idea if the clock is going to produce a "BEEP" or a "DONG" sound. Unless he tamper with the clock as well?
Edit2: Just check the previous chapter. Kiruma turn his head before the DONG sound so I guess the sound won't make much difference