Based on the “Osshobe love story” known to the Kaga prefecture,「Haruiro Heart」is a story of how the most important people in your life are right in front of you.

Mei’s parents are getting divorced and has decided that her father will take custody of her.

Mai is struggling with infertility, resulting in the relationship with her husband to fall apart.

Makoto is having trouble confessing his feelings to Ayane, who is part of the same dance club, while Ayane is getting irritated with his indecisiveness at the dance training camp.

Everyone visits the hot springs ryokan facing different problems in their daily lives.

But the ryokan goes into panic when Mei, Mai and Makoto suddenly disappear.

Mei’s mother, Mai’s husband, Ayane and Aoi, the okami of the ryokan, all start thinking of the worst-case scenario.

The only one who knows the ending to the series of events is the Komon cedar tree that has been protecting and growing its roots within the ryokan for 400 years.

加賀地方（粟津温泉）の『おっしょべ恋物語』をベースにした『はるいろハート』は大切な人は常に目の前にいることを教えてくれる物語。

芽衣は両親の離婚の結果、彼女を引き取る母と二人で。舞はなかなか子宝に恵まれず、そのことが原因で夫婦関係にひびが入っている夫と二人で。誠は引っ込み思案の性格から恋心を抱く同じダンス部の彩音になかなかハッキリ物が言えず、彩音もそんな誠にイライラする中、ダンス部の合宿で。それぞれが、それぞれの事情を抱えたまま加賀の温泉旅館に訪れていた。そんな3人の姿が見えなくなり、旅館は騒然となる。芽衣の母、舞の夫、彩音、そして旅館の女将、葵の頭の中に最悪の事態が去来する。そんな事態の結末を知るのは、旅館の敷地に腰を下ろす樹齢400年の黄門杉だけであった。