Dictionary / Vocabulary / 深入り
ふかいり
getting deeply involved; going deeply into; going too far (into something)
母は、長女が芝居の研究会にはいっていることは知っていたが、まさか舞台に出るまで深入りしているとは、知らなかった。
Her mother knew that her eldest daughter had signed up for a drama seminar, but she had no idea that she was so deeply involved as to appear on stage.