OP credits are in order so I think this part should be split between Yoshino Matsumoto and Tomoko Sugidomari, as Shibata's part is right after this post and there's only a brief pair of cuts sandwiched between post #203863 and this, which would be Nagasaka's by process of elimination

The close up of Iida with his brother reflected in his glasses is confirmed via handwriting + credit order in the 3rd gengashuu