Context: Gintoki explains the "gap rule," gyappu ruuru ギャップルール.
{{fudan wa riizento de tsuppate-iru} yatsuga tamaa ni {ii} koto shitari suru} to monosugooku koukando ga agaru 普段はリーゼントでツッパっている奴がたまーにいい事したりするとものすごーく好感度が上がる If {{a guy [who] {normally [wears] a pompadour and acts tough} does something {good} once in a while} [his] popularity rises by a lot.
koukando 好感度 Level of favorability. Popularity. How much people like someone.
i.e. when a bad guy does something good, people's opinion of him suddenly changes from bad to good.
