Seikou_ep_01_sub_ita.mp4 Here

While "Seikou" most commonly refers to the 2013 OVA in this context, the name also appears in other media:

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 Seikou_Ep_01_SUB_ITA.mp4

A more recent OVA project (Winter 2025/26). While "Seikou" most commonly refers to the 2013

Seikou! Lose A Virgin For The First Term (2013) - aniSearch.com Seikou_Ep_01_SUB_ITA.mp4