Maruto's already established a pattern - Yuu agrees to a string of setups and convienient girlfriends he's hoping will help him fall out of love with Hikari/over Aya. Maybe he gets a happyish ending where he settles or maybe there's a time skip and he's learned something and Hikari/Aya's open to giving him another shot.
Or maybe Hikari manages to convince Aya that Aya is who Yuu really wants b/c Yuu was willing to throw Hikari away, but I'm skeptical b/c Yuu already told Aya this and Aya didn't find him convincing.
What pattern? You see, you're just spouting nonsense with no textual basis. Yuu never accepted "convenient girlfriends" (and he fell in love with Ayami by the same reasons Hikari also did after), and the fact that he only went on a date with Seki after she harassed and insisted proves it, when she would have been a "conveniently easy" escape at a time when Hikari was just seriously taking her first steps toward Taa-kun.
Thank goodness you finally realized that Maruto designed Seki to be the slut girl with multiple boyfriends that this forum thinks Yami is.
Anyway, this thread has been another festival of misandrist mockery at the expense of the poor boy and validating Hikari's SELFISHNESS, who still hasn't done a single truly selfless thing regarding Yuu —while she's capable of disappearing to actively search for the "best friend" who didn't hesitate to betray her in the past.
More than ever, I raise a glass to Yuki Hirai's victory.
I wouldn't be surprised if he decided to do the "I can't choose between them" and then let him have do the virgin walk into adulthood and then have a compilation of him being a corporate slave and eating konbini bentos while chugging beers in trunks in his pigsty of an apartment and jacking off to his memories of Aya.
If this were the planned ending for Yuu, Maruto would have made him far more despicable and pathetic than he has done with him. He's way too far from being the Haruki of Closing Chapter. More points for Yuki towards victory. Incidentally, for a character who has every chance of dying a virgin without ever finding another guy, there's Hikari herself, just like what happened with Eriri in the movie Saekano, being a spinster virgin still sighing for the MC.