If that's actually the case, then he will just end up in the category with the rest of the spineless/cowardly MCs
My fearless prediction:
Hataki will start putting distance between them. 'Cause he's not worthy or some BS.
Momogusa will start being closer to him at school since he's avoiding her in her apartment.
Hataki quits his 'cleaning' job to make more distance.
His sister will celebrate because it means more time with her and away from big boobs.
Momogusa will start to spiral into depression because of Hataki.
Hataki will start to spiral into depression because of Momogusa.
Hataki's sister will push the two back together because she doesn't want to see her brother like that.
Thirty+ misunderstanding chapters later, Momogusa and Hataki will get together and the next chapter is the series ending.
There will be an epilogue set 10 years in the future where Hataki's still cleaning up after Momogusa plus a kid.