"Where were you?."

Some time after the world hero mission, Bakugou started training more with Midoriya and Todoroki which left Kirishima a little bit hurt, not because of the fact that Bakugou was training with them, but because he started to distance himself for Kirishima.

After the end of their second year they had stopped talking all together. Everyone was concerned but no one intervened. At some point, in the middle of third year Midoriya questioned Bakugou about him not acknowledging Kirishima in class or in training, but Bakugou completely shut down the conversation and it wasn't brought up again that year.

A few years later Bakugou and Midoriya became partners, Todoroki took over Endeavour's agency and Kirishima opened his own agency. Kirishima ended up moving his agency to a different district of Japan closer to Kaminari, Mina, Sero and Tamaki.

All of a sudden Kirishima is sent on a mission by the hero commission to infiltrate a Villain Drug den in the same district as Bakugou and Midoriya's agency. Bakugou and Midoriya had been struggling with apprehending the villains , so the hero commission decided to get a hero who wasn't known in the area so Kirishima wouldn't get recognised while under cover.

No one apart from the commission knew about Kirishima's mission, so when 6 months past of Kirishima not showing up to his agency, the commission got concerned, because the mission should have ended in only 2 months, which made the hero commission post a nation wide report of Kirishima missing but not mentioning his mission.

Bakugou starts to panic and instead of focusing on his agency, he spends his time try to find his ex best friend.

Secrets and regrets are revealed and a new threat appears...