Came to be studying with us with 〜ことになる

Grammar Explanation: To end up being with 〜ことになる

A new student joins Conan’s elementary school classroom. The teacher introduces her.

先生(せんせい):: 「今日(きょう)からみんなと勉強(べんきょう)する事(こと)になった、灰原(はいばら)　哀(あい)さんです！」; "This is Ai Haibara. It came to be that she'll be studying with us starting today."; 「みんな仲良(なかよ)くしてあげてね！」; "Everyone be friendly with her!"