Chiaki-kun?

While waiting for a train, a boy plays games on his cell phone. As the train nears, he moves to jump off the platform, seemingly in a trance. He's shocked back into reality as the train passes him at high speed.
Later that day, three boys sit on the roof of their school, chatting. One of them is the boy from the first scene, Kotake Tohru. He asks the other two if they've ever thought of jumping off the train platform. The boy with glasses, Nojima Kaname, immediately says no. Senkawa Daiki (Called Sen-chan), the other boy, asks Kotake if he wants to die. Kotake responds that he doesn't want to die, he wants to jump.

Toki wo Kakeru Shoujo?
Kaname points out it's the same thing, since the result is death. As their conversation turns toward who's ever thought of dying, a girl comes to the roof to call for Sen-chan.
That night, while playing vidja gaems on his Wii(?), Kotake receives a call from Kaname. Kaname says that Sen-chan has died.
Meanwhile, some mafia are beating up a man. They berate him for making their 'merchandise' pregnant, saying he's not off the hook though she aborted it. Just then, Fumika shows up. Two of the mafia move to assault her, but are easily defeated. The third attempts to pull out a handgun, but Fumika knocks it up and cleanly catches it. She then tosses it back to him, leaving the man flabberghasted as she approaches their victim. Fumika hands the victim a Shigofumi, but when he opens it, the letter is naught but a bloody handprint. As she leaves, she tells the mafia members to continue, and we can conclude that the victim meets a BAD END.

Ne, Otou-san?
The next day, Sen-chan's suicide is the talk of the town. At school, Kotake is called to the Principal's office, and is questioned since he was friends with Sen-chan. Back on the roof, it's just Kotake and Kaname now. As they debate why Sen-chan committed suicide, Kotake wonders if he really was Sen-chan's friend. Kotake says that after being asked time and time again about Sen-chan, he's realized that he didn't really know much about Sen-chan at all. Kaname somewhat agrees, citing a story about him and a girl who were rather close in middle school. The girl apparently went on to kill her father, and Kaname does not know the reason to this day.

Thank gosh I'm better friends with my friends than that.
Flying around above the city, Kanaka asks Fumika why humans would commit suicide. The latter responds that humans are broken and imperfect.
That night, various TV shows discuss why Sen-chan would commit suicide. Some say that he was bullied, or his father abused him, or it was the 'boredom syndrome'. Kotake shuts off the TV, saying they're all wrong.
By the second day after Sen-chan's death, all this talk has finally made Kotake curious about the reason as well. As he muses, Sen-chan's father enters the room and proceeds to take all the students hostage.

Uh oh.
While the news reports the hostage incident, the detective from last episode is shown running urgently. Back in the classroom, all the desks and chairs have been used to blockade the door. Sen-chan's father asks the students if any of them know why Sen-chan committed suicide. As the detective arrives at the scene outside the school, he's addressed as 'Noj-san'. They wonder if he's there to help, but he says that his son is in the school. Noj-san seems to see Fumika entering the school, but as he calls out to her, she disappears.

You may yet play a role of some importance.
Sen-chan's father is still interrogating the students, and now he wants to know who was closest to Sen-chan. Kotake begins to have a series of flashbacks, and it is re-iterated that Sen-chan obviously had no intentions of dying. Kotake is broken out of his reverie by Sen-chan's father, who's somehow found out that Kotake was close to Sen-chan. Sen-chan's father asks Kotake who pushed Sen-chan to the edge, but Kotake can't answer. However, when asked why he doesn't know of the reason, Kotake turns the question back around to Sen-chan's father. This puts Sen-chan's father on the defensive, but just then the blockade is broken and Fumika appears.
In the police command room, Noj-san mutters his son's name, which is Kaname. A radio transmission informs the officers that 24 SWAT members have arrived on the scene.
As everyone stares at Fumika, she hands Kotake a Shigofumi, from Senkawa Daiki addressed to Kotake Tohru. Of course, Sen-chan's father objects, but when he tries to take the letter forcefully, he gets Fumika's gun to his temple. At the sight of Fumika's gun, Kaname is suddenly reminded of the girl he spoke of earlier. A helpless Sen-chan's father pleads Kotake to read the letter out loud, and the latter agrees.

Poor guy. Well, at least he'll get some homo buttsecks in jail.
In the letter, Sen-chan says that he had felt like jumping too. Therefore, he jumped from the roof of his apartment building …and died. (LOL WTG) The letter goes on to say that he did it because he felt like it. This, of course, causes Sen-chan's father to go nuts, saying that the letter is fake. Kotake disagrees, but before he can explain the SWAT team throws in a flashbang and apprehends Sen-chan's father. After Sen-chan's father is dragged away, Kotake wonders if he can truly be Sen-chan's friend.
Kaname, meanwhile, has tracked Fumika to try and confirm his suspicions. He reaches the rooftop, calls out to here as 'Mikawa', and asks her why she killed her father. The next scene shows a girl sleeping in a hospital bed, ending the episode showing a book with the name 'Mikawa Kirameki' on it.

Is this sum setup for next episode?

Thoughts:
Wow, Shigofumi delivers another great episode. An especially juicy 'Oh shi-' moment occured with the Shigofumi of a bloody handprint. Apparently fetuses can send Shigofumis too, lawl. The episode also builds up towards revealing more about Fumika's past, as Kaname recognizes her as the girl he knew in 8th grade. Speaking of Kaname, his father appears to be a recurring character (Aside from Fumika.) who may or may not end up playing an important role later. We'll see.
Fun fact: 'Sen-chan' was used 30 times in the course of this entry.