When Seigi learns that his college classmate Tanimoto Shoko is going to a marriage meeting, Seigi is disheartened.
Seigi has some feelings for the gemstone-loving Shoko.
All he has left in his possession is a teardrop-shaped loose aquamarine he purchased from Richard that he intended to give to her.
Unable to say anything to Shoko, the discouraged Seigi returns to Etranger, where Richard gently encourages him by telling him to live without regrets.
However, behind his words is a part of Richard's past unknown to Seigi...
People regret the things they didn't do 
more than the things they did.
يندم المرء على ما لم يفعل 
.أكثر من على ما فعل
Menschen bereuen Dinge,
die sie nicht gemacht haben, mehr,
« Les Hommes regrettent davantage
La gente rimpiange le cose che non ha fatto
più di quelle che ha fatto.
As pessoas se arrependem das coisas que deixaram
de fazer mais do que das coisas que fizeram.
Люди будут сильнее сожалеть о том,
чего не сделали, чем о том, что сделали.