noun, noun or participle which takes 'suru', intransitive verb
night crawling; sneaking into a woman's bedroom at night for sex
Historical custom, mainly pre-modern rural Japan, where a man would visit a woman at night for sexual relations, often with tacit social acceptance. Now archaic and used only in historical or literary contexts.
昔の農村では、夜這いという風習があった。
In old farming villages, there was a custom called night crawling.
彼は夜
He was caught while sneaking into a woman's room at night.