Crushology 101 () is a 2025 South Korean television series starring Roh Jeong-eui, Lee Chae-min, Kim Hyun-jin, Kim Min-chul, Hong Min-gi and Cho Jun-young. The series depicts the love story of the female protagonist Bunny, who is surrounded by four attractive boys after breaking up with her dark first love. It premiered on MBC TV on April 11, 2025, and aired every Friday and Saturday at 21:50 (KST). It is also available for streaming on Kocowa and Viu in selected regions.
Its eighth episode on May 3, 2025 drew a rating of 0.7%, the lowest ever recorded for a drama airing in the prime time slot on a terrestrial television network. This record is shared with the February 20, 2025 episode of Kick Kick Kick Kick (which thereafter was moved to a late-night time slot and received lower ratings). Its peak single-episode rating of 1.5% and its overall average ratings of 1.0% are also the lowest ever recorded for a drama airing entirely in the prime time slot on a terrestrial television network.
The drama follows a college student, Bunny, who breaks up with her first love after a disastrous relationship. Healing from a broken heart, she is suddenly courted by not one but four attractive men.
Crushology 101 is written by Sung So-eun, directed by Kim Ji-hoon, and produced by Kakao Entertainment. It is based on the Kakao Webtoon Bunny and Her Boys by author Ni-eun, which has recorded 170 million cumulative views.
On April 30, 2024, Hankook Ilbo reported that Roh Jeong-eui had been cast as the lead role in the series. On May 1, it was reported that Lee Chae-min had decided to appear and was about to start filming. On September 19, Roh, Lee, and Cho Jun-young were confirmed.