Can't remember the title of an old manga

[Geany]

Years ago I read this nice shounen about a delinquent (or delinquent-looking) high-schooler that has to help (read: conquer) a dead guy's harem, with the aid of said dead guy's ghost. I think the title had something flowery in it, but I could be wrong. It was adapted from a light novel, and a translation of that exists somewhere, since I read at least part of it.
Does someone remember the title?

 

[MrIncognito]

https://mangadex.org/title/2a8d61ab-5547-47fc-899f-933a2e44aced/-aoi-hikaru-ga-chikyuu-ni-ita-koro

 

[Geany]

Thanks!