Which Thai BL series, about university engineering students competing in a faculty rivalry, popularised the genre in 2016?

• A 2gether
• B Bad Buddy
• C SOTUS ✓
• D Dark Blue Kiss

SOTUS: The Series (2016) starring Singto Prachaya and Krist Perawat is widely credited with launching the modern Thai BL drama boom, set in an engineering faculty hazing system.