"Finally, I can make you mine, senpai." Her cute kouhai is secretly a tyrannical heir?

"I'll make sure you know exactly how much I like you. You'd better prepare yourself." Amane is troubled by the heavy workload caused by a shortage of staff at her company. One day, she reunites with Ikuya, an underclassmen at her college who had admired her during her university days, and Ikuya starts working at Amane's company. Amane's burden is lightened and things seem to be going well, but... on the way home with Ikuya, Amane feels something is off. Ikuya knows where she lives, even though she hasn't told him, and he knows that she doesn't have a boyfriend. Ikuya, who was a cute, Golden Retriever-type kouhai during her university days, finally shows his true colors!