Captain of the Knights and Me

Fortune Teller and Me

The Imperial Court Magician and Me?!

Shota and Me?!

King and Me?!

Fortune Teller and Me?!

Extras

The king’s brother and Me?!?

The Vice Captain of the Knights and Me!?

The Demon King, Vice Captain of the Knights, and Me?!

The knight, the mage, and Me?!

In the forest, the C and Me?!

The Villainess and Me?!

The Villainess' Scheme and Me?!

The Villainess's Marriage Interview and Me?!

The Minstrel and Me?!

Detective King and Me?!

The Culprit and Me?!

The Seven Trials and me?!

Riko does to me and?!

Al’s little sis and my little sis!?

The Capture Targets and Me!?

Transfer Ring and Me?!

The Real Deal and Me?!

The True Heroine's Choices and Me?!

The title of heroine and me?!

A Setting Change and Me?!

Srategy Meeting and Me?!

Last Resort and Me?!

The Original World and Me?!

Because of his little sister, high school student Tarou (Placeholder) is transferred to an otome game as the heroine. The more he tries to avoid the handsome love interests, the further he advances into their love routes! 
 
In the end, will he be able to return to his original world?! 
And will he be able to protect his chastity?!
 
(Source: Shonen Gangan, translated)
 
Note: Chapter count ncludes the original two-part story as prologue, plus five volume bonus chapters, four extras chapters, four "Ore Hero" Arasuji Manga Gekijou chapters, and a Shonen Gangan 30th Anniversary bonus manga.