How He Fell in Love

Leo came back from his little quest to find Calypso broken-hearted, and discouraged. Love was overrated. He locked himself in Bunker 9 and didn't let anyone in. Until a certain son of Hades shadow-traveled inside and found Leo half dead and bleeding out. But, he didn't do it himself. All he did was the three small lines on his wrist. Nico has taken it upon himself to keep an eye on the young son of Hephaestus. Neither of them expected to grow feelings for each other, and neither of them knew what would happen next. They didn't know what to do. So, of course, they confide in one not-so helpful helpful friend, he daughter of Aphrodite.
What could go wrong?