Kono Sankaku Love Come wa Shiawase ni Naru Gime ga Aru.

is a Japanese light novel series written by Chihiro Haruna, with illustrations by Tetsubuta. The series began publication on March 10, 2022 by ASCII Media Works under their Dengeki Bunko publishing imprint.

The series won the gold prize in the 28th Dengeki Novel Prize.

Synopsis
'''The happiest love triangle in romantic comedy history! This is the goal of a love triangle romantic comedy!''' "Why are you liked by Leila !?" A mediocre high school student, Tenma Yashiro, happens to find out that a cool beautiful girl in the same class, Rinka Emperor, is fond of her childhood friend, a neat and clean beautiful girl, Reiyoshi Tsubaki. From there, Tenma will cooperate so that Rinka can get along with Leila. "If Yashiro isn't dating her Rinka-chan, could I run for her?" "Yayo, what did you do !?" Leila fell in love with Tenma and developed a love triangle with two beautiful girls from the school! The whereabouts of this intricately entwined love ……!?