The cleavage window is a fashionable addition to many tops or dresses that allow a peek at the lovely curves beneath. Where they're featured depends largely on the individual garment's design, but they never fail to accentuate and highlight the bust in all the best ways.
Ayaka Kamisato (from Genshin Impact) looks simply heavenly in her flowing gown that shows off her bust, doesn't she?
Sneak a peek at the illustrations below. We won't tell.