Ranpo was kidnapped and Fukuzawa went looking for him. Upon his arrival Ranpo had a gun pointed at him. Fukuzawa took out everyone and Ranpo came running up to him after it all

Ranpo: Wow, that went better than I expected. You arrived just in time, just as I-

*Fukuzawa slaps the Glasses off Ranpo’s face *

Fukuzawa: Screw you! To Hell with your damn calculations! When I got here, there was a gun pointed right at your face!

Ranpo: That happened only because I knew you’d save me!

Fukuzawa: Showing off your abilities is fine. Using your intellect against powerful enemies is good. But I want you to stop wagering your own life on your stupid risky gambles! You’re still just a child. With a lot more to learn.

Ranpo: starts sobbing and says “I’m sorry” repeatedly