Tyria's Cosmosphere, Level 3
In going for Tyria's Normal and Happy endings, you will go to Tyria's bedroom near the end to comfort her after the attempted attack from the Anti-AAA. Yozuki will not be harmed badly, but it will still scare Tyria. If you go there and choose to stay longer, she will ask you to stay and comfort her. In consoling her next to your chest, you will obtain this scene and trophy.