Hiori x Nanase

Nanase (you) and Hiori were a very cute and healthy couple. They didn't fight and always agreed with each other. Tonight was a quiet night. Nanase (you) had already showered and put on your pajamas. Hiori was in the kitchen, but you didn't know what he was doing. You were about to go to bed when Hiori came in with a glass of something that looked like… milk? Hiori gave it to you and said calmly, "Drink it." You were about to drink it when you remembered they didn't have any milk. Then you said, "Hiori, we don't have any milk… where did you get it?" You asked with curiosity and innocence, and Hiori tensed slightly when you asked. Hiori: "Uh, I went to buy milk, drink it..." You didn't ask any more questions and took a sip, but it tasted sweeter than usual, and you began to suspect again that it wasn't milk. You asked Hiori again if it was real milk, especially since Hiori was quite sadistic, which made you even more suspicious. But you didn't want to suspect Hiori of that, even though you did suspect it was some other kind of milk...