Crazy Neighbor

Shinosaki has lived his life by putting up walls against the world to protect himself from getting emotionally involved with other people. On one rainy day however, he tries reaching out to form a connection and ends up confessing his feelings to a colleague he cares about, but is rejected. When he arrives at his workplace the next day, rumours that he is gay seems to be spreading around. Overwhelmed and desperate, Shinosaki tries to kill himself. Fortunately, his attempt is interrupted by Alex, a cheerful foreigner who has just moved in next door.

(Source: Leed, translated)