こんたん
ulterior motive; plot; scheme; complicated circumstances
Common word
Noun
お前まえの魂胆こんたん見みえ見みえなんだよ。
Your intentions are easy to see, you know.
今日こんにちはトムがやけに親切しんせつだけど、何なにか魂胆こんたんでもあるのかしら。
Tom is unusually kind today. I wonder if he has ulterior motives.