Peter Grill and the Warrior That Shouted Love (ピーター・グリルと愛を叫んだ戦鬼, Pītā Guriru to Ai o Sakenda Senki) is the 12th episode of Peter Grill and the Philosopher's Time anime series.
Peter has no choice. If he wants to rid himself of Lisa once and for all, he must become the ultimate wingman and help Spartokos get laid.
Antonio and Lisa start their duel. Peter is confident that Antonio is now stronger than Lisa, but seeing her smile and Antonio moving slower than usual, he realizes that Lisa is using her boobs to distract Antonio, who can't move his eyes from them. Realizing that, Peter knows the fight is over and moments later, Lisa defeats Antonio with Peter commenting that his decision to remain a virgin costed him the win.
Antonio later wakes to realize he lost again and Peter knows that if they ask for a rematch, the result would be the same. As Mitchy comes to visit him, Peter realizes that Antonio needs to get used to be around women. Peter pulls Antonio aside and tells him that Mitchy is known form being a connoisseur of guys with huge muscles and he would be able to win her. Peter explains that he can't beat Lisa due to being too susceptible to the charms of the opposing sex and he needs to build up experience with women. Antonio doesn't like the idea losing his virginity to other woman than Lisa, but Peter tells him he had butterfly in his stomach when Mitchy is around. Antonio doesn't deny it, but comments he is devoted to Lisa and Peter points out that's the problem as he is depriving himself of other possibilities as he is too focused on her. Mitchy who had overheard them, joins the conversation and states that he knows he deeply loves Lisa, but she deeply loves Antonio. Hearing that Antonio falls for her too and Peter leaves them alone.
The next day, after sleeping with Mitchy, Antonio feels different and Peter tells him he can now take on Lisa. However, Antonio states that he was correct for being too focused on one woman. Mitchy then shows and Antonio melts in front of her, stating that he already forgot about Lisa and leaves with Mitchy. Lisa then shows up and thanks Peter for helping out Antonio as he is great leader and soldier. She asks him what is true happiness for him, being married to a naive woman and having Albatross as father-in-law or something else. And if he is with her, he can be a king of a nation. As Lisa leaves, Luvelia shows up and seeing her smile, he knows this is his path of happiness. She informs him that the Goblin Invasion started and they head out and plan to go on vacation after the mission is over.
Meanwhile, the Elite Hobgoblins and Peter's sister appear.