@Bertorion, there are 700+ ecchi harem series on mangaupdates https://www.mangaupdates.com/series.html?perpage=50&genre=Ecchi_Harem&orderby=rating
, 200+ borderline-h harem series
https://www.mangaupdates.com/series.html?perpage=50&category=borderline%2Bh&genre=Harem&exclude_genre=Ecchi&orderby=rating
, surely there must be a few that can fill the void in your heart (or in your privates)?
I think Yuragi-sou no Yuuna-san is the best series fulfill the void for to love-ru, until to-love-ru comes back with another sequel: https://www.animenewsnetwork.com/news/2017-04-09/to-love-ru-story-creator-darkness-is-not-the-final-chapter/.114325)