Cool Na Otto Wo Koi Ni Otosu Houhou summary:

[from cotton candy scans]“Starting from today, I’ll be your husband.”The person I’ve admired for so long suddenly becomes my “husband?!" Takatsuki Honoka, 22 years old. I’ve been crushing on someone since I was in high school. He’s my father’s subordinate, the cool and handsome, yet super kind Nagakura Kousuke-san. One day, Kousuke-san suddenly becomes my “husband…!”“Honoka…” Kousuke whispered into a confused Honoka’s ear…?