[There had been a lot of things he expected after tossing out that threat. Were they going to ignore him and go after Mika? Were they going to attack them both, since Yuuichiro's fighting to protect a bloodsucker? What he couldn't have expected, is what winds up happening.
Which is why his entire body tenses up when he feels those gentle arms wrap around him. She's... trying to comfort him? Green eyes stare straight ahead for a moment, even as she explains herself and tries -- yet again -- to reassure the two boys. Then, Zero's talking, but by that point... even more tears are streaming down Yuuichiro's face. After clenching his teeth together in his efforts to stop crying, a loud sob breaks free. He's wrapping both arms around the woman, and then burying his face against her shoulder.
The next words a escaping from him before he can even hope to stop them:] He's all I have left... Even if he's a vampire, I can't lose him, too... That... that sick bastard already killed the rest of my family!!! I can't--... [His voice is just barely a whisper, if that. It's almost whimpered out between the sobs.] I don't wanna be all alone, again...
[When the sobs finally fade, his crying finally coming to a stop... he pulls back enough to turn and look at Mika. The blond is on his knees. Yuuichiro's expression is a mixture of strained and... exhausted, honestly. Gently, he moves to tug free of Yuuki's hold. Without saying a word, he moves over to the blond-haired boy and tugs him into a hug.] I think... they really wanna help us, Mika... We should let them.
[He's glancing back to the two adults.] Maybe... [He looks back to Mika, the ghost of hope entering his eyes.] Maybe we can find a way to change you back...