一筋縄では行かない

ひとすじなわではいかない

expression

•

not straightforward, not dealt with by ordinary means

一	one, one radical (no.1)
筋	muscle, sinew, tendon, fiber, plot, plan, descent
縄	straw rope, cord
行	going, journey, carry out, conduct, act, line, row, bank

さき

じかん

いねむ

ぶん

あ

、

こんど

しけん

ひとすじなわい

かん

ただよ

Taking into account the time I'd just spent napping, I'm really picking up the sense that this time's exam really won't be straight forward

かれ

ひとすじなわ

He is hard to deal with