justification, rationale, warrant / self-justification, presenting one's own deeds or words as reasonable

to justify, to rationalize

(traditional) customs or rules

(colloquial) current boyfriend

everything

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

everyone, one and all

see you later (said by a person leaving, a stock phrase required by the Japanese etiquette, lit.: (after) going, I will come back)

the coming days

bring (someone to a person/place)