YES but id be happy to share more!!
- regarding their first meeting in the hospital, I like to think it was eichi who suggested tatsumi to change up his look if he wanted to start his idol career anew, prompting tatsumi to come up with the idea of cutting his hair.
- i also think since tatsumi and eichi exchange handwritten letters sometimes instead of sending long messages through hold hands since tatsumi's known to be not too skilled with using a phone.
- eichi uses the fact that he's aira's roommate as an excuse to meet up with tatsumi more often lolol. if he's free and aira has to go to alkaloid's practice sessions, eichi will just tag along simply to watch tatsumi. (tatsumi thinks this is quite odd and wishes eichi would find better things to do in his free time)
- eichi has attempted playing many elaborate pranks on tatsumi but tatsumi is quite unfazed by them
- whenever they need to discuss matters related to work, their way of doing so is by taking a nice stroll in the es garden followed by a cup of tea
- eichi enjoys tatsumi's cooking and has requested him to make more meaty dishes on multiple occassions to which tatsumi fullfills his requests and always makes an extra lunch for him whenever he cooks for alkaloid