乳合わせ 胸合わせ おっぱいキス
When two girls press their breasts (of roughly equal size) against each other. If there is a noticeable size difference, it is asymmetrical docking instead.
The term originates from Yuusha ou GaoGaiGar, in which the combined form of Hyouryuu and Enryuu, Chouryujin, was released through a maneuver called "symmetrical docking". Later, other similar paired mecha performed the same combining maneuver.
The following tags are aliased to this tag: breast_to_breast (learn more).
This tag implicates breast_press (learn more).
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