Rumbling Hearts is a tV series anime that premiered in fall 2003, produced by Studio Fantasia.

About the production: the story comes from a visual novel, there are 14 episodes of about 23 minutes and its current status is "finished".

Its main genres are drama, romance and slice of life, with themes such as Love Triangle, Heterosexual, Netorare and Work.

On AniList, Rumbling Hearts has an average score of 66%, a good score, and appears on 26,174 users' lists.

At first, Takayuki Narumi is befriended by Mitsuki Hayase only because Mitsuki's best friend, Haruka Suzumiya has a crush on him; however since then, Takayuki, his pal Shinji Taira, and Mitsuki have grown to be the best of friends. Then one day, Haruka confesses to Takayuki her love for him. Not wanting to hurt her feelings, Takayuki agrees to go out with her. After a few incidents, their relationship gets intimate, even while Takayuki and Mitsuki begin to realize their feelings for each other. But suddenly, when tragedy strikes, things are never the same for these four friends again.

Official synopsis from AniList.