炬燵 こたつ
kotatsu

Noun

1. kotatsu; table over an electric heater, with a hanging quilt to retain heat (orig. over a charcoal brazier in a floor well) — explanation

Usually Written in Kana
こたつで ちゃったら風邪 かぜ くのはあたりまえ。自己 じこ管理 かんりがなっていない。
kotatsude nechattara kaze hiku nowa atarimae. jikokanriga natte inai.
Of course you'll catch a cold if you fall asleep under the kotatsu. You have to learn to take care of yourself.
Other forms: