Shin Hyun Soo

Sungjin High School is thrust into chaos as an alien invasion begins, unleashing violent insect-like creatures worldwide. With the South Korean military overwhelmed, mandatory conscription is imposed on all third-year high schoolers, forcing them to undergo military training while facing impending university exams. Platoon leader Lee Chun Ho guides them through rifle shooting, combat, and obstacle courses, all in their school uniforms. Class teacher Park Eun Young strives to protect her students. Can these high schoolers become saviors in the face of global doom? (Source: MyDramaList) ~~ Adapted from the webtoon "Duty After School" (방과 후 전쟁활동) by Ha Il Kwon (하일권).

Ba U, a degenerate man involved in gambling, stealing, and fighting, hides his true identity while making money through Bossam, a remarriage custom in Joseon where widows were kidnapped to marry. During one such act, Ba U mistakenly kidnaps Princess Hwa In, daughter of King Gwang Hae and daughter-in-law of his enemy Lee I Cheom. Forced into a political marriage to her late husband's brother, she becomes a widow on her wedding day. (Source: MyDramaList)