Guys, i'm currently looking for a shoujo manga. The female heroine is a kaichou who is very smart and beautiful but kinda cold-hearted. The boy is very popular among girls, he gets a lot of chocolate from girls every valentine day. His father works in the company of the girl's father. Somehow they both got engaged and her father wants to announce it to the media so he asked the girl to confess to the boy infront of everyone.

Thanks in advance