Bondage theme 2 (ecchi)

gag, gym suits, buruma, balltie,

ball gag, gag, mizugi, konawa, arm bind, ketsu,

gag, boxtie, shinju, nipple clasp, oppai, dekappai, nipples, ketsu

gag, panchira, pantsu, shinju

balltie — Bound in a seated position with the knees up, the head bent down over the knees, and the hands behind the back. Commentary: This posture quickly becomes fatiguing and should not be used for extended periods of time on people who are not accustomed to it.

buruma (ブルマ) — After the 1964 Summer Olympics in Tokyo, a new style of bloomers which fit the body closer, similar to volleyball uniforms, became commonplace. Around the mid-1990s, however, sports shorts were chosen instead, citing modesty concerns. Some people are interested in bloomers in clothing fetish and animanga contexts. Wikipedia

chikubi (乳首) — Japanese for "nipples".

gym suits — Clothes prescribed for wear while participating in gymnastic exercise. This may be, from mid-60s to mid-90s, buruma (bloomers) or spats, mid-90s on, for lower torso while t-shirt worn for upper torso in both time frames.

ketsu — Japanese term for fleshy portion of body, next to the genetals, used to sit upon. Between the cheeks is location of the anus.
Similar words: Arse, ass, bottom, butt, buttocks, etc.

shinju (真珠) — Meaning pearl, shinju is a euphemism to refer to the binding of female breasts. It has been popularly claimed that "shinju" is an authentic Japanese term for a "bikini harness". However, no such tie called a "shinju" is found in historic or present kinbaku.