SOTUS: The Series (Thai: SOTUS: The Series – พี่ว้ากตัวร้ายกับนายปีหนึ่ง; SOTUS: The Series – Phi Wak Tua-rai Kap Nai Pi Nueng, lit. SOTUS: The Series – The Evil Senior and Mr. Freshman) is a 2016–2017 Thai BL television series starring Perawat Sangpotirat (Krist) and Prachaya Ruangroj (Singto). It is an adaptation of the novel SOTUS: พี่ว้ากตัวร้ายกับนายปีหนึ่ง by Bittersweet. The title SOTUS refers to the S.O.T.U.S. system which Kongphop (Prachaya Ruangroj) and his fellow freshmen have to undergo to be recognized by the hazing team, led by third-year student Arthit (Perawat Sangpotirat), as their official junior students. As the activities unfold, the two groups go through a series of conflicts and reconciling, and the friendship and love among them gradually flourish.

Directed by Lit Samajarn and produced by GMMTV together with Felloww, the series was one of the two television series announced by GMMTV in early 2016 along with Senior Secret Love. It premiered on One31 and LINE TV on 20 August 2016, airing on Saturdays at 22:00 ICT and 24:00 ICT, respectively. The first eight episodes aired between 20 August 2016 and 8 October 2016. After the passing of Thai King Bhumibol Adulyadej, the series was ordered to stop airing during the 30-day official mourning period. The remaining eight episodes were eventually shown between 19 November 2016 and 7 January 2017, effectively delaying the finale from its originally intended air date of 3 December 2016. On 14 January 2017, a special episode aired entitled SOTUS: Very Special EP, which featured never-before-seen and behind-the-scene scenes.

In early March 2017, a sequel of the series entitled SOTUS S: The Series was announced where both Perawat and Prachaya will reprise their roles. The sequel premiered on 9 December 2017 and was followed by a spin-off on Our Skyy (2018).