Interesting setups, two hot ex-boyfriends ended up fucking, what a blessing. Really looking forward to what'll happen next. If I had to guess... they've been attracted to each other already, more likely Kuroda's gonna fall for Shirado first, but it takes Shirado a while to realise this feeling is towards Kuroda himself all along and nothing because of Ran? Anyways, wish this is going to be a sex heavy story through and through (Sensei! Onegaishimasu!).