Obviously the one in the first panel and the one who showed the cue card. Besides after seeing Len bullying Kaito his expressions kind of show which one's which.
Welcome home, dearPlaying house!I made a delicious meal for you!Uh... Sorry, today I'm going with a co... co-worker...Cue cardSceneWhat! Even though you already have me!... together, we're going to the p... p... uh...... pub to get drinks, after all