[Ammolite] Big Brother,Help Me! ~I've been asked to help with my nighttime bridal training...~

Overview： "Big brother,be my practice dummy for my bridal training! I've tried out all the housework on you,so now it's time for... night bridal training..." I (Mitsuyoshi),(Natsuhiko),and his sister (Nanaka) are childhood friends. Nanaka barged into my room and called me "Big brother",so we were close enough. And Nanaka brought that up. "Night bridal training?" Is there a difference between day and night bridal training? "Wh-why me? Just ask Natsuhiko,right?" "Huh? There's no way I could ask my real big brother for something like that!" I didn't ask back,"Well,what is it about?" "Only you can ask me for something like this. So please!" In the end,I was pushed by Nanaka's anger and ended up helping with the "night bridal training"... "Well then... let's get started," Nanaka said,putting her hands on her own clothes and starting to take them off.