何年か振りに、私はOB会事務所にお弁当を持って行きました。
しかし、私のケアレスミスにより、結果的にやるべきミッションを済ませ、午後2時過ぎ自宅でお弁当を美味しく食べました。
For the first time in years, I took my lunch to the OB office.
However, due to a careless mistake on my part, I ended up completing the mission I was supposed to do and had a nice lunch at home after 2pm.