5-Toubun no Hanayome is practically "the We Never Learn of Weekly Shounen Magazine", with same theme (a poor guy who have to teach some girls), cool heroines and a funny romantic comedy between Main Character and your apprentices.
Both are shounen harems with a similar tutor x students setting.
And while 5toubun focuses more on character development and plot progression, Bokuben is more on episodic comedy and everyday shenanigans.
Another Harem manga but this one is from Jump,if you enjoyed toubun you should check out,really funny and nice characters remind a bit of Nisekoi style as well anyway if you're a harem fan you know the drill
TL;DR basically nisekoi syndrome pick one and hold on to it till the end
well this reccomendation will as simple as walking in a park ,
common thing u can find in this series :
LOTS OF GURL , u can name all type of dere they have it
Harem but not Harem ( perhaps its still not end yet )
Real life so no harem (sad tho )
thing u will hate :
nisekoi all over again
-Anime romance shows of Winter 2019
-Gotoubun has better romance and character development
-Gotoubun manga is much more developed and has a much better story from 74 chapters currently compared to Gomikano's (trash in Japanese) 220+ chapters with repeated drama
Gotoubun community is also much better than Domestic's due to the little drama and no annoying plot points
-The mc is trying to fix relationships between sisters
-Both of them are well written and interesting harems
If you want a good harem series with family conflicts and great characters then i definitely recommend the two.