be related / be romantically involved

pin someone down while twisting their arm

(idiomatic) A piece of cake; an extremely simple thing, something trivial, a cinch, easy as pie.

朝飯前: A piece of cake; an extremely simple thing.

(telephony) a common Japanese telephone greeting: hello; used when answering the telephone / used to confirm that the person being addressed is listening, or to confirm if anyone is listening

put away

lovers' quarrel

(idiomatic) to look for a fight; lit. to sell a fight

(idiomatic) to take on a fight; lit. to buy a fight

fighting/arguing and breaking up