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I'd say Arifureta is pretty ecchi at times, particularly the end of the first LN. Physical copies too!
If you watch anime or read manga, and you have some you liked but never got a conclusion to, then it's worth checking if they are based on a light novel and reading that.
I recommend the following series (I choose ones with physical copies as I believe that is what you want?):
Arifureta: From Commonplace to World's Strongest - A isekai about a guy who gets betrayed and becomes a very strong and every edgy guy. I really enjoyed it, as in way too much. - Amazon.it, Bookdepository.
Seirei Gensouki - A isekai about a guy who has his mind merged with the mind of a kid from another world, which makes him very smart and very op. - Amazon.it, Bookdepository.
A Sister's All You Need - A romance about a group of college kids, with most of them being light novel authors. Really good. - Amazon.it, Bookdepository.
Bottom-tier Character Tomozaki - A romance/life improvement novel about a gamer who tries to get better at living life. - Amazon.it, Bookdepository (only some volumes).
Classroom of the Elite - A story about some very odd and some smart kids, going to a school were everyone can become rich and you can buy good grades with money. It's a story with a lot of 5d chess. - Amazon.it, Bookdepository.
Reign of the Seven Spellblades - Like a fusion of Harry Potter and classroom of the elite. - Amazon.it, Bookdepository.
I have included links to bookdepository and amazon for the novels reocmmended. Both stores ship to itality without any import fees or extra vat to be paid. (If someone recommends rightstuff, be aware that it can get very, very, very expensive when shipping to europe)
You can buy them off Amazon