
1) Gaku throughout the story has been giving Sumito sad/hurt looks for not remembering his childhood with him. He does it enough where Sumito feels anxious about “not being the version Gaku fell in love with”
2) Then after the cliff jumping scene we see the white-haired guy imbed Sumito’s childhood memories into glasses man.
3) Gaku’s then confronted with the Theseus Paradox (vaguely) except it’s split into 2 people: “Sumito” who has their shared memories or Sumito who has the body.
…I let this cook in my brain for too long
Bro was faster than the speeding bike