question for goonertale (Patreon)

idk if you guys have noticed but in the sex scenes i've made the background look kinda how it looks when you enter battle in undertale but i keep the colors on characters, and my question is should i make the characters also in that black and white aesthetic that the battle spites have but with just like the eyes and in the case of frisk her heart shaped hair thingy with color, or do i keep doing it with just the background being in the battle style?