to do something for someone in exchange for a favor or help later
後で助けや好意と引き換えに誰かのために何かをすること (ato de tasuke ya koi to hikikae ni dareka no tame ni nanika o suru koto)
"We agreed to scratch each other's backs in this business deal."
"私たちはこのビジネス取引でお互いの背中をかくことに同意しました。" (Watashitachi wa kono bijinesu torihiki de otagai no senaka o kaku koto ni doui shimashita)
to suddenly become very angry or lose control
relief after dealing with a stressful situation
to go for a walk or leave; to go away
a shy person who avoids social activities
to finish or conclude something
secretly or without public knowledge
