Why Did This Killer Join a Girl Band?

Mygo+Lonely Rock+mujica+Crying Girl Band Lin, code name Ψ (Psi) - Psi, a humanoid weapon whose daily job is to send targets on their way gracefully. The new order asks him to go to Japan as an exchange student. The mission is: to find the source of resonance! I almost forgot that I was still a high school student when I was doing dirty work all the time... It shouldn't be difficult... However, fate played a joke on him: Takamatsu Light: "Can... Can you... Form a band with me for a lifetime?" (Lin:?! This is more stressful than bomb disposal!) Ichisato Goto: He shrinks into a mushroom in a corner every day, but when he suffers from social anxiety, he will unconsciously hold him as a life-saving straw! (Lin:... This feeling... Is not bad...) Toyokawa Shoko: "Why are you thinking about other people?!" (Lin: Go ahead and eat your food!) Shimokitazawa Archangel·Hikasha Itachi: "Xiao Lin, you are such a good boy~ Do you want to join my band?" (Lin: Next time... Definitely next time!) Kita Ikuyo: "Hongka-senpai is right! Come on, come on! I'll show you the magic of omelette rice every day!" (Lin: I have to say it's very tempting...) Nina Isori: "Hurry up and form a band with me!!! (Picks up the stereo and shakes it around)" (Lin: ... Where is this little girl from!) Thus, the most outrageous collapse of painting style in history began: Top killer, left-hand sniper rifle calibration, right-hand guitar tuning! When the desire to protect breaks through the killing instinct, when the band career is more exciting than the killer resume... Who will the vicious blade code-named Ψ turn against in the end? This super-standard band, Shura Field, composed of lies and girlish heart sounds, is about to burst into action!