They were both in love with each other but never showed it at first
In their past life, both loved each other. The seme loved the uke but since he was the heir he had to marry and have a child with his wife. The relationship between him and the uke continued, but both felt hurt by the fact that they can never truly be together, just the two of them. The seme goes on a "business" trip (historic) and comes back to find that the uke is at his deathbed. The seme beg for the uke to live yet he dies. In their current life, they are happily married with two happy kids.
Uke liked the seme from the start
Seme was in love with the uke
the uke and the seme were together in their last life as well, though the uke was a butterfly while the seme was a mystical tiger. In the current life, the uke reincarnates into a human but the seme is still a mystical tiger. [SPOILER] the seme turns into a human
the seme was in love with the uke
seme was in love with the uke
Both of these adorable dumbasses loved each other and took a whole while to confess and be official
seme was in love with the uke, while the uke was in love with the other friend, who ends up becoming a father
Wakarazuya no Renai Houteishiki