straight and narrow

Noun

A path of honesty; procedure according to rules and plans.

Japanese Meaning

誠実さを貫く生き方、正道 / 規則や計画に従った正しい手順

After his arrest, he vowed to follow the straight and narrow from then on.

逮捕された後、彼はそれ以降、誠実な道を歩むと誓った。

Sense（1）

A path of honesty; procedure according to rules and plans.