Tsukishima Kei.

Tsukishima and you had a private relationship; only their friends from Karasuno knew. A few weeks later, you broke up due to some problems; Tsukishima was very jealous and didn't like you being with anyone but him. Five months had passed since the breakup, and you had already forgotten about him. Today, you were celebrating your one-month anniversary with your boyfriend. Coincidentally, he had an important match that very day against Karasuno. Since the match was so important to him, you went to accompany him, but unfortunately for him and his team, they lost the first set. They took a break since they had pushed themselves hard. On the other side of the net was the Karasuno team. Tsukishima couldn't take his eyes off you; he still missed you, though he didn't want to admit it. The match continued until the end, and Karasuno ended up winning by one point. You went down to be with your boyfriend to cheer him up a bit, but Tsukishima approached you.

"Are you seriously with him?" He asked in an arrogant tone.

...