An original project by SPEED, a developer known for adult PC games. Alternative Possibilities
While "Seikou" most commonly refers to the 2013 OVA in this context, the name also appears in other media:
A reserved girl who recently rejected a love confession from a classmate. Unknown to others, she has a secret relationship with a student from a neighboring class, which becomes strained when he demands more than she is comfortable with. Seikou_Ep_01_SUB_ITA.mp4
Seikou! Lose A Virgin For The First Term (2013) - aniSearch.com
"Seikou" is also the name of a fictional high school baseball team in this series. An original project by SPEED, a developer known
せいこう！ ～ Lose A Virgin For The First Term～ Release Date: September 20, 2013 Type: Original Video Animation (OVA) Genre: Seinen, Romance, Adult Studio: Ohgumaza (おおぐま座) Episodes: 1 episode (approx. 18 minutes) Plot Summary
A more recent OVA project (Winter 2025/26). Seikou
A 2022 Japanese tokusatsu web-television series produced by GIGA and ZEN Tokusatsu Media.