The dad joke is kicking in, and they are not even married yet
Ahー
I'm taking a break.Good job.Sensei, are you tired?You surprised me...Yeah, I'm a bit tired.It's better to rest when you're tired.Don't worry, I'm fine.
Hardy
Har
Because I'm just obsessed with Chiyomi-chan.Just kiddingー
A joke that uses Japanese wordplay.
つかれてる (tsukareteru) - to be tired
とりつかれてる (toritsukareteru) - to become obsessed