おはよう。春樹兄さん。寝癖ついてるよ。
tbd
Good morning, Haruki. Your hair got messed up while you were sleeping.
Good morning, Haruki. Your hair looks like you just got out of bed.
Morning, Haruki. You've got bed hair.
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兄さん， にいさん， あにさん
1. older brother, elder brother
2. brother (as older-brother figure in friendly and or work relationship)
3. young man, buddy, fella, laddie
tbd
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寝癖， 寝ぐせ， ねぐせ
1. bed hair, hair disarranged during sleep
2. habit of moving around in one's sleep, sleeping habit
tbd