Shin & Heisuke Mashimo vs. Seba

**Shin & Heisuke Mashimo vs. Seba** is a battle fought between retired and active hitmen, Shin and Heisuke Mashimo respectively, and employee of the Lab, Seba.

## Prologue

After Sakamoto encountered a trap, Shin was forced to continue advancing through the Lab in order to get to B5 to rescue Lu Shaotang. However, on his way, Shin sensed a dangerous presence. Seba then attacks him, but Shin reacts and dodges. Seba states that it's better when his targets don't notice. Shin tells him that Lu better be safe. However, that isn't of any concern to Seba as he just follows orders and can't seem to remember whether the bonus promised to him was to kill Shin or bring him alive. Shin states that he needs Seba out of his way and that he can't help him earn extra pocket money. Seba tells him about his plan of saving up 20 million yen by retirement age. However, he hates working overtime and activates his invisible suit, hoping to end this fight by the end of the workday.

## Battle

Seba quickly disappears, but Shin is able to locate him using his thoughts. However, it is to no avail as he is still attacked numerous times. He is able to read Seba's thoughts but it's no use if he doesn't know how he'll attack. Seba then punches Shin so hard he coughs up blood, before stating that he doesn't like clocking out too early, so he wants to stretch out the fight until closing time. The battle continues and Shin is knocked down. Seba says that Shin is a pain with his clairvoyance, but Shin says that the reverse is even more true. It is at that time that Shin sees the shadow of a familiar bird. Seba knows that it's almost closing time and gets a dagger ready to finish Shin off. He stabs Shin, but Shin stains his clothes with blood. Shin remarks that now he won't miss. Seba is confused, but he is then hit by two bullets. Heisuke arrives and states how the world is full of interesting people. Shin then says that Heisuke had nice timing. Once that is said, Heisuke is filled with happy thoughts, but Shin states that his thoughts are complete gibberish, due to his stupidity. Seba states that Heisuke is a pain and hides in a corner. Heisuke asks him whether that's a good spot and just after, sends a bullet to Seba, injuring his shoulder. He activates his suit, rendering him invisible. Heisuke, however, can stil hear and uses that to shoot. Seba dashes and dodges the bullets. He takes off his jacket and wraps it around a lead pipe. He then throws it at Heisuke, who is injured in the shoulder. Seba reaches where Heisuke is and wears his jacket. He then explains how he doesn't have supernatural abilities and that the suit makes anything it is on invisible. Heisuke tries to shoot, but Seba stamps his foot on the rifle. The bullet comes back and seemingly takes Seba's arm off. Heisuke regains his footing and tells Seba to back off or his head's next. Shin, however, sees the truth behind everything and tells Heisuke to run. In reality, Seba is just making that arm invisible. He then stabs Heisuke and says that it's time for the "third rate assassins" to go home. Heisuke calls out to Shin and receives a bullet from Piisuke. He shoots at Seba, but it ricochets into a sprinkler. Water comes down, and Seba becomes visible. Shin wraps his legs around him and takes him down, defeating him.

   .

## Aftermath

Heisuke congratulates him on receiving the message from his thoughts, but Shin retorts by saying it was hard figuring out the gibberish. However, they are interrupted by an explosion that was triggered by Kashima. Below, in B5, Kashima states that in twenty minutes, the Lab will be destroyed. But Sakamoto responds by saying that even five minutes is plenty.