Ive lately been enjoying novels where the Protagonist goes back in time, or rather has memories of the future sent to their younger selves. I preferably enjoy novels where the protagonist uses said knowledge to better their life, and perhaps the life of those around them too. Irritatingly enough however, I've noticed more than a few novels within the Second Chance category seem to be more focused on how many girls they can add to their harem rather than bettering their lifestyle. As such I am here requesting any recommendations which focus more on the protagonist bettering hem selves than gathering a harem or some such. NOTE: I'd prefer if no Yaoi were recommended. I don't mind polygamy though I stress that this must not be the main plot drive. I'd rather it be sub-plot if anything.
If there is an anime / manga series that you like, you can find a bunch of fanfiction with the do-over premise. Of course you'll need to spend a little time to find the good ones, but when you find one it can be really good.
Royal Roader on My Own Rebirth of the Thief Who Roamed The World Lv1 Skeleton Emperor of Solo Play I Reincarnated For Nothing From what i remeber all of these have time travel or second chance
Mother of Learning, time loop rather than second chance. Not listed on NU. Reign of the Hunters Doom Lord I Reincarnated For Nothing Night Ranger The Amber Sword
Recommend all of them except the skeleton one (have yet to read) Reincarnation Of The Strongest Sword God is good too