I'm feeling the exact same way my friend especially when it comes to Asta x Noelle personally it's not as big as Deku x Ochako, but it's close. I'd say they are right behind them which IzuOcha themselves are right behind TouKen for me. The underdog story is really what also fascinates me in some cases, and leaves me a little curious as to how Asta will achieve his goal. Also what I really enjoy about this series is Asta and Yuno's relationship. They genuinely feel like friends unlike another series that did this. Are you planning on collecting the Volumes? I've bought up to Volume 5 from what I remember (checking through collection) actually yes it was Volume 5 for me.
Also did you see the trailer for the anime coming out in October?
I'm extremely cautious about it since Perriot is the one behind it.