godan verb (-ru), transitive verb, intransitive verb
be absorbed in reading; get lost in a book
Describes being so engrossed in reading that one loses track of time or surroundings. Often used with books, novels, or manga.
彼は週末ずっと小説を読みふけっていた。
He spent the whole weekend absorbed in reading a novel.
電車の中で漫画を読みふける
It's fun to get lost in a manga on the train.