I've been rereading all of Scarlet Beriko's manga. Tatsuyuki Oyamato the 4th is by far the most messed up, even more so than its prequel Jealousy. I completely understand if this isn't someone's cup of tea. Like Jackass, the problem with this oneshot is that it's doing too much at once. It makes sense for Scarlet Beriko to do a five volumes long prequel series after wrapping this up, as she has invented so much backstory for the characters that it'd be a waste not to do more with it. However, I don't know if this amount of lore is really necessary here. The more I think about it, the more I'm certain that this manga is a ploy to pique the reader's interest in the serialization for the Uichi prequel, which rightfully so as it is a more compelling story. Still, I wish more energy went into developing Tatsuyuki and Nozomi's relationship. There's something interesting going on in there, but it never got a chance to grow. On top of that, I was put off by the insane pacing and notable amount of plot holes. Definitely not for the faint of heart. I don't know who I would recommend this to, unless you're super into yakuza BL or enjoyed Jealousy and want more in the same universe.