What Year Is It Today?

Two "beautiful girls of the 21st century" and a female classmate Ji Chacha traveled through time in history class and came to a dynasty country that they had never heard of. In order to rescue their classmate Ji Chacha, and to prevent the recurrence of various evils, they must improve their status and even hegemony. During the journey through time, they met the cute young lady and the charming and talented man, and started a super sweet sister-brother relationship and a hot-tempered girl's love affair with a gentle and beautiful man... Is it just a dream, or is it the past and present life? What year is it today? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.