Kodoku na Taka wa Hitokoishikute

From Rain over Paradise:

'Senpai, I want you to fall for me.'

When Hotaka, his junior at college, suddenly confessed to him during their student days, Yuu felt so embarrassed that he gave him the brush-off. He was brusque with Hotaka, but even now, he regrets hurting his cute junior he cared about more than anyone.

However, when they happen to meet each other again after several years, Hotaka has turned into a devilish man who’s bent on seducing a drunk Yuu….