I am glad theres so much love for Melody sensei. Shes best girl along with the neko maid (ch39).
Did she pretty much create a shaped charge munition that pierced the armor dude?
If her man leaves her with a minute encounter with another girl, then i dont think the guys were ever really interested her in the first place. Probably was just in it for a pump and dump. Maybe Shiina was doing her a favor after all.