天使の小窓

A small gap between the buttons of a button-up shirt, usually exposing a view of the character's cleavage. The gap may be caused by a popped button, a partially unbuttoned shirt, or by a taut shirt tenting out due to the character's bursting breasts.

The shirt should still be buttoned above and below the breasts, and the breasts should not be fully exposed.

See also

• center opening
• cleavage cutout
• partially unbuttoned
• popped button
• unbuttoned shirt

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