Little brother of Ranze who is also a hybrid. 

He is the main male protagonist in part two of Tokimeki Tonight (vols 17-22).

The main character, Ranze, is a junior high girl with troubles: her father is a vampire and her mother is a werewolf. Ranze has yet to manifest her supernatural powers, and her parents are beginning to get worried she might be normal. So begins the fantasy romantic comedy story. 
(Source: Anime News Network)

This is a long, epic manga that spans three generations of the Etou family. The first part is about Ranze, a relatively normal high school girl, except for the fact that her father is a vampire, her mother is a werewolf, and that she has magical powers of her own. Her family was banished from the Magic World to live among the humans, and they now guard the gate between the two realms. The story really begin when Ranze falls for a human boy, which her parents strictly forbid. Later story arcs focus on Ranze's brother and on Ranze's daughter.
 (Source: Anime News Network)
 
Note: Includes 9 extra chapters.

Rinze Etou