ストレッチ体操: stretching (exercise)

everything

(colloquial) current boyfriend

(slang) Alternative form of 彼氏 (kareshi, “boyfriend”)

everyone, one and all

muscle, tendon / vein, artery / reason, logic / plot, storyline / counter for long thin things; counter for roads or blocks when giving directions / lineage, descent

Counter for long, thin things.

Synonym of 黄昏 (tasogare, “dusk; twilight”) / Synonym of 黄昏時 (tasogaredoki, “dusk; twilight”)

it is easier said than done

(humble) alternative form of いってきます (itte kimasu)