Uso! Aitsu ga Watashi no Danna-sama!? - Mezametara 10 Nengo no Mirai

It should have be my first time, but for some reason, my body reacts to the pleasure like it knows it all too well! This isn't me! I fell down a stairway and accidentally slipped ten years ahead in time... where I found out that at some point I get married to a childhood friend who I do nothing but fight with! Then, he suddenly kisses me deeply, and I lose all control... and despite my virgin heart, my mature body accepts all of him... why is my body enjoying this so much?! What's going on?!