Ryousuke and Kaede are high school friends and very close but their personalities are very different. Kaede is the serious type while Ryousuke is usually laid back and gets lectured by Kaede. However, Ryousuke was not impressed with the new transfer student Fumi, clinging to Kaede due to a promise he made in kindergarten. Also, Kaede got angry at Ryousuke who acted like a asshole after finding out that Fumi is gay and wants to be with Kaede.
Houjou and MInami have been friends for 20 years and became lovers recently who wants to move in together. They are also co workers (different department) who need to make up an excuse why two adult men are going to live together but everything already say that they have the married life relationship after being friends so long not realizing they are dating.
Tsubasa and Kusaka eloped at 17 when their parents refused their relationship. 15 years later at 32 years of age, they are still together and living happily. However, Kusaka suddenly wanted to break up which forced Tsubasa to figure out why and how to fix it.
Suki ni Shitaiyo