Masami Iwasawa/Plot

Events prior to A Step Closer
Prior to Chapter 1 of A Step Closer, the former bandmates of Girls Dead Monster were able to find eachother. How they found each other wasn't explicitly stated. However, they were able to unite the rest of the battlefront members through the use of their music, in which they became a very popular band that amassed a large following through social media. This allowed those who regained their memories to seek out Girls Dead Monster and eventually form what is the revived version of the Afterlife Battlefront.

Chapter 4
Iwasawa was amongst the members of the Top Brass when Otonashi came into the room and declared that he would rejoin the battlefront.

In The Restaurant
Both Girls Dead Monster and Top Brass went to a restaurant to celebrate Otonashi's return. She supported Hinata's request for Otonashi to reveal the details of his life so far. As Otonashi ended off his explanation and how he returned back to the real world, she did a cheers for him for making his dream and not explicitly implied, his return back to the battlefront.

Her Motorcycle
As everyone said their goodbyes, Iwasawa made the offer to drop off Otonashi after overhearing that he didn't have a ride and didn't bring his motorcycle. She walked alongside her fellow bandmates listening into their conversation on how Hisako beat a couple of the Top Brass at Mahjong, before she said her goodbyes to them. Iwasawa then glared at Sekine, who made a face at her because she and Otonashi would be left all alone as they left.

She leans against her motorcycle and asks him if he ever drove one before, to which he replies that he has since he owns one. They had a comfortable moment of silence and offered for him to drive her motorcycle. While she rolled her eyes at his poor attempt to abide by common safety rules, she took out a pair of glasses from her bike's compartment and gave it to him.

After laughing at him as he attempted to get used to driving the bike, they went on a relatively long night drive. At one point, Otonashi wanted to push the limit and increase the speed beyond what was legal and when he attempted to look at her for approval, she stroked his stomach. During the drive, she leans against him but he was too invested in the drive to notice.

His Place
After their drive, they eventually get off her motorcycle and he thanks her. Sort of concerned for her, he offers her to come inside but she responds in a joking way that it was distasteful to invite a girl inside his own home without asking her out. He apologizes and explains his concerns but says that it's best if he offered her a place to sleep, even though that wasn't the first thing he said. She takes the opportunity to point that out, but accepts him on that offer.

Her motives are revealed when they are both inside and she asks him how he left the afterlife. He explains everything he remembers, from the shadows attacking and the graduation ceremony. He also explained that he eventually became the student council president and wanted to help everyone move on.

After hearing all the details, she began to tear up and says his first name, before finally asking why he can't remember her.