1曲5分で計算して600分、10時間かかりますからねー。
その上2曲に1回僕が歌うので、もっと伸びます。
これはイベントの性質上、どうしようもないですね(^^;)

At 5 minutes per song, that totals 600 minutes, which takes about 10 hours, you see. On top of which, I sing once every two songs, so that extends it further.

This is the nature of such events, so there's really no help for it. (^^;)