바빠서 연락이 안 돼는 거였구나, 그럴 수 있지.

Bappaseo yeollagi an dwaeneun geosyeossgeuna, geureol su issji.

Oh, so it was because he was busy that he couldn’t contact me; that makes sense.

내가 오늘 행복하다고 느낀 이유는 바로 그거였구나, 날씨가 좋아서였어.

Naega oneul haengbokhadago neukkin iyuneun baro geugeosyeossgeuna, nalssiga joaseoseosseo.

Oh, so that's why I felt happy today—it was because the weather was good.

오, 이렇게 하는 거였구나! 이해가 다 되었어.

Oh, ireohge haneun geoyeossgeuna! Ihaega da doeeosseo.

Oh, so this is how it's done! Now I understand everything.

진짜로 그 사람이 너를 좋아하는 거였구나, 몰랐어.

Jinjaro geu sarami neoreul joahaneun geosyeossgeuna, mollasseo.

Oh, so that person really did like you—I didn't know.