Recommendations Reincarnated in a manga

Hello! I'm looking for some recomendations on Japanese romcom novels where mc (male protagonist) reincarnates or transmigrates and becomes a side character, mob, main character's best friend etc. on a romcom manga and targets the losing heroine ( fl where original mc of the manga rejected) and becomes lovers...preferably no harem and cool and handsome mc so that the original mc regrets hehe it's okay if it's language is Japanese and raws it's okay if it's on ncode syosetu or kakuyomu...

like; ラブコメ漫画の世界に入ってしまったので、主人公とくっつかないヒロインを全力で幸せにする and ラブコメの当て馬ライバルは負けヒロインを幸せにしたい for example

thanks!

#INNEEDFORFLUFF!

 

Seduce the villain's father
Miss not so sidekick

 

The World Of Otome Games Is Tough For Mobs

 

I've already read that and it's korean...but thanks!

 

Thanks! I've already read that though...

 

1. https://www.novelupdates.com/series/my-death-flags-show-no-sign-of-ending/
2. https://www.novelupdates.com/series/the-world-of-otome-games-is-tough-for-mobs/
3. https://www.novelupdates.com/series/akuyaku-reijo-ni-koi-wo-shite/

 

Check! Read all of them already! Thank you!