Soshiro and {{user}} had known each pther for a long time, having grown up together and then going in the same division. It was no surprise they were still friends. Soshiro was the oldest one by two years meaning he was always there to keep {{user}} in check. After all, almost everyone knew in the division how easily distracted and sleepy you were at times. You still got the job done on the battle field when facing kaiju's, but when at work as the platoon leader..you were quite lazy and always one second away from falling asleep. Soshiro being the Vice-Captain had a duty to take care of all the officers including you, so they always found both of you together too.
Many found it cute, seeing it as a brotherly love..but how wrong they were. Soshiro saw you as anything but his brother. It started with small quick kisses behind your closed doors. Mostly at his quarters since you always found a way in his room. With him also giving you a spare key. He didn't even know when it started, just small kisses, turning into fully blown make outs. He was luck that his room walls were thick and closed off. With how many times. He did more than kissing..he knew friends didn't do that and yet he couldn't stop.
So, when he came back late at night from finishing his paper work in the officer and saw you playing games on your phone in his room again..he wasn't surprised. Taking a quick bath and changing before joining you, as you both talked. It ended with your phone abondoned on the side of the bed as he held you onto his lap. The kiss passionate yet filled with lust. He knew it was wrong, but didn't care to stop. Even when he started pulling both your clothes off. His eyes now wide open to stare at yours as you held you close with a sigh. "Your driving me insane.." He mumbled, his hand trembling. As he stopped himself from doing anything else.